This depends a lot on what you mean by "revert".

Temporarily switch to a different commit

If you want to temporarily go back to it, fool around, then come back to where you are, all you have to do is check out the desired commit:

# This will detach your HEAD, that is, leave you with no branch checked out:
git checkout 0d1d7fc32

Or if you want to make commits while you're there, go ahead and make a new branch while you're at it:

git checkout -b old-state 0d1d7fc32

To go back to where you were, just check out the branch you were on again. (If you've made changes, as always when switching branches, you'll have to deal with them as appropriate. You could reset to throw them away; you could stash, checkout, stash pop to take them with you; you could commit them to a branch there if you want a branch there.)

Hard delete unpublished commits

If, on the other hand, you want to really get rid of everything you've done since then, there are two possibilities. One, if you haven't published any of these commits, simply reset:

# This will destroy any local modifications.
# Don't do it if you have uncommitted work you want to keep.
git reset --hard 0d1d7fc32

# Alternatively, if there's work to keep:
git stash
git reset --hard 0d1d7fc32
git stash pop
# This saves the modifications, then reapplies that patch after resetting.
# You could get merge conflicts, if you've modified things which were
# changed since the commit you reset to.

If you mess up, you've already thrown away your local changes, but you can at least get back to where you were before by resetting again.

Undo published commits with new commits

On the other hand, if you've published the work, you probably don't want to reset the branch, since that's effectively rewriting history. In that case, you could indeed revert the commits. With Git, revert has a very specific meaning: create a commit with the reverse patch to cancel it out. This way you don't rewrite any history.

# This will create three separate revert commits:
git revert a867b4af 25eee4ca 0766c053

# It also takes ranges. This will revert the last two commits:
git revert HEAD~2..HEAD

#Similarly, you can revert a range of commits using commit hashes (non inclusive of first hash):
git revert 0d1d7fc..a867b4a

# Reverting a merge commit
git revert -m 1 <merge_commit_sha>

# To get just one, you could use `rebase -i` to squash them afterwards
# Or, you could do it manually (be sure to do this at top level of the repo)
# get your index and work tree into the desired state, without changing HEAD:
git checkout 0d1d7fc32 .

# Then commit. Be sure and write a good message describing what you just did
git commit

The git-revert manpage actually covers a lot of this in its description. Another useful link is this git-scm.com section discussing git-revert.

If you decide you didn't want to revert after all, you can revert the revert (as described here) or reset back to before the revert (see the previous section).

You may also find this answer helpful in this case:
How can I move HEAD back to a previous location? (Detached head) & Undo commits

Lots of complicated and dangerous answers here, but it's actually easy:

git revert --no-commit 0d1d7fc3..HEAD
git commit

This will revert everything from the HEAD back to the commit hash (excluded), meaning it will recreate that commit state in the working tree as if every commit after 0d1d7fc3 had been walked back. You can then commit the current tree, and it will create a brand new commit essentially equivalent to the commit you "reverted" to.

(The --no-commit flag lets git revert all the commits at once- otherwise you'll be prompted for a message for each commit in the range, littering your history with unnecessary new commits.)

This is a safe and easy way to rollback to a previous state. No history is destroyed, so it can be used for commits that have already been made public.

Note on merge commits:
If one of the commits between 0766c053..HEAD (inclusive) is a merge then there will be an error popping up (to do with no -m specified). The following link may help those encountering that: Why does git revert complain about a missing -m option? (thanks @timhc22 for pointing out)

Rogue Coder?

Working on your own and just want it to work? Follow these instructions below, they’ve worked reliably for me and many others for years.

Working with others? Git is complicated. Read the comments below this answer, consider other answers, and discuss with your team before you do something rash.

Reverting Working Copy to Most Recent Commit

To revert to the previous commit, ignoring any changes:

git reset --hard HEAD

where HEAD is the last commit in your current branch

Reverting The Working Copy to an Older Commit

To revert to a commit that's older than the most recent commit:

# Resets index to former commit; replace '56e05fced' with your commit code
git reset 56e05fced 

# Moves pointer back to previous HEAD
git reset --soft HEAD@{1}

git commit -m "Revert to 56e05fced"

# Updates working copy to reflect the new commit
git reset --hard

# Push your changes to respective branch
git push -f

Credits go to a similar Stack Overflow question, Revert to a commit by a SHA hash in Git?.

The best option for me and probably others is the Git reset option:

git reset --hard <commitId> && git clean -f

This has been the best option for me! It is simple, fast and effective!

** Note:** As mentioned in comments don't do this if you're sharing your branch with other people who have copies of the old commits

Also from the comments, if you wanted a less 'ballzy' method you could use

git clean -i

NOTE : This is getting a lot of attention. It's super important you do not do this if you're working on a branch which other people working from, also (depending on time frame) not one remote which has been merged with master. You will run into git hell.

Before answering let's add some background, explaining what this HEAD is.

First of all what is HEAD?

HEAD is simply a reference to the current commit (latest) on the current branch. There can only be a single HEAD at any given time (excluding git worktree).

The content of HEAD is stored inside .git/HEAD, and it contains the 40-bytes SHA-1 hash of the current commit.

detached HEAD

If you are not on the latest commit - meaning that HEAD is pointing to a prior commit in history it's called detached HEAD.

On the command-line it will look like this - SHA-1 hash instead of the branch name since the HEAD is not pointing to the the tip of the current branch:

A few options on how to recover from a detached HEAD:

git checkout

git checkout <commit_id>
git checkout -b <new branch> <commit_id>
git checkout HEAD~X // x is the number of commits t go back

This will checkout new branch pointing to the desired commit. This command will checkout to a given commit.

At this point you can create a branch and start to work from this point on:

# Checkout a given commit.
# Doing so will result in a `detached HEAD` which mean that the `HEAD`
# is not pointing to the latest so you will need to checkout branch
# in order to be able to update the code.
git checkout <commit-id>

# Create a new branch forked to the given commit
git checkout -b <branch name>

git reflog

You can always use the reflog as well. git reflog will display any change which updated the HEAD and checking out the desired reflog entry will set the HEAD back to this commit.

Every time the HEAD is modified there will be a new entry in the reflog

git reflog
git checkout HEAD@{...}

This will get you back to your desired commit.

git reset HEAD --hard <commit_id>

"Move" your HEAD back to the desired commit.

# This will destroy any local modifications.
# Don't do it if you have uncommitted work you want to keep.
git reset --hard 0d1d7fc32

# Alternatively, if there's work to keep:
git stash
git reset --hard 0d1d7fc32
git stash pop
# This saves the modifications, then reapplies that patch after resetting.
# You could get merge conflicts, if you've modified things which were
# changed since the commit you reset to.

• Note: (Since Git 2.7) you can also use the git rebase --no-autostash as well.

This schema illustrates which command does what. As you can see there reset && checkout modify the HEAD.

You can do this by the following two commands:

git reset --hard [previous Commit SHA id here]
git push origin [branch Name] -f

It will remove your previous Git commit.

If you want to keep your changes, you can also use:

git reset --soft [previous Commit SHA id here]

Then it will save your changes.

If you want to "uncommit", erase the last commit message, and put the modified files back in staging, you would use the command:

git reset --soft HEAD~1

• --soft indicates that the uncommitted files should be retained as working files opposed to --hard which would discard them.
• HEAD~1 is the last commit. If you want to rollback 3 commits you could use HEAD~3. If you want to rollback to a specific revision number, you could also do that using its SHA hash.

This is an extremely useful command in situations where you committed the wrong thing and you want to undo that last commit.

Source: http://nakkaya.com/2009/09/24/git-delete-last-commit/

The best way is:

git reset --hard <commidId> && git push --force

This will reset the branch to the specific commit and then will upload the remote server with the same commits as you have in local.

Be careful with the --force flag as it removes all the subsequent commits after the selected commit without the option to recover them.

I have tried a lot of ways to revert local changes in Git, and it seems that this works the best if you just want to revert to the latest commit state.

git add . && git checkout master -f

Short description:

• It will NOT create any commits as git revert does.
• It will NOT detach your HEAD like git checkout <commithashcode> does.
• It WILL override all your local changes and DELETE all added files since the last commit in the branch.
• It works only with branches names, so you can revert only to latest commit in the branch this way.

I found a much more convenient and simple way to achieve the results above:

git add . && git reset --hard HEAD

where HEAD points to the latest commit at you current branch.

It is the same code code as boulder_ruby suggested, but I have added git add . before git reset --hard HEAD to erase all new files created since the last commit since this is what most people expect I believe when reverting to the latest commit.

OK, going back to a previous commit in Git is quite easy...

Revert back without keeping the changes:

git reset --hard <commit>

Revert back with keeping the changes:

git reset --soft <commit>

Explanation: using git reset, you can reset to a specific state. It's common using it with a commit hash as you see above.

But as you see the difference is using the two flags --soft and --hard, by default git reset using --soft flag, but it's a good practice always using the flag, I explain each flag:

--soft

The default flag as explained, not need to provide it, does not change the working tree, but it adds all changed files ready to commit, so you go back to the commit status which changes to files get unstaged.

--hard

Be careful with this flag. It resets the working tree and all changes to tracked files and all will be gone!

I also created the image below that may happen in a real life working with Git:

Assuming you're talking about master and on that respective branch (that said, this could be any working branch you're concerned with):

# Reset local master branch to November 3rd commit ID
git reset --hard 0d1d7fc32e5a947fbd92ee598033d85bfc445a50

# Reset remote master branch to November 3rd commit ID
git push -f origin 0d1d7fc32e5a947fbd92ee598033d85bfc445a50:master

I found the answer from in a blog post (now no longer exists)

Note that this is Resetting and Forcing the change to the remote, so that if others on your team have already git pulled, you will cause problems for them. You are destroying the change history, which is an important reason why people use git in the first place.

Better to use revert (see other answers) than reset. If you're a one man team then it probably doesn't matter.

Extra Alternatives to Jefromi's Solutions

Jefromi's solutions are definitely the best ones, and you should definitely use them. However, for the sake of completeness, I also wanted to show these other alternative solutions that can also be used to revert a commit (in the sense that you create a new commit that undoes changes in previous commit, just like what git revert does).

To be clear, these alternatives are not the best way to revert commits, Jefromi's solutions are, but I just want to point out that you can also use these other methods to achieve the same thing as git revert.

Alternative 1: Hard and Soft Resets

This is a very slightly modified version of Charles Bailey's solution to Revert to a commit by a SHA hash in Git?:

# Reset the index to the desired commit
git reset --hard <commit>

# Move the branch pointer back to the previous HEAD
git reset --soft HEAD@{1}

# Commit the changes
git commit -m "Revert to <commit>"

This basically works by using the fact that soft resets will leave the state of the previous commit staged in the index/staging-area, which you can then commit.

Alternative 2: Delete the Current Tree and Replace with the New One

This solution comes from svick's solution to Checkout old commit and make it a new commit:

git rm -r .
git checkout <commit> .
git commit

Similarly to alternative #1, this reproduces the state of <commit> in the current working copy. It is necessary to do git rm first because git checkout won't remove files that have been added since <commit>.

Say you have the following commits in a text file named ~/commits-to-revert.txt (I used git log --pretty=oneline to get them)

fe60adeba6436ed8f4cc5f5c0b20df7ac9d93219
0c27ecfdab3cbb08a448659aa61764ad80533a1b
f85007f35a23a7f29fa14b3b47c8b2ef3803d542
e9ec660ba9c06317888f901e3a5ad833d4963283
6a80768d44ccc2107ce410c4e28c7147b382cd8f
9cf6c21f5adfac3732c76c1194bbe6a330fb83e3
fff2336bf8690fbfb2b4890a96549dc58bf548a5
1f7082f3f52880cb49bc37c40531fc478823b4f5
e9b317d36a9d1db88bd34831a32de327244df36a
f6ea0e7208cf22fba17952fb162a01afb26de806
137a681351037a2204f088a8d8f0db6e1f9179ca

Create a Bash shell script to revert each of them:

#!/bin/bash
cd /path/to/working/copy
for i in `cat ~/commits-to-revert.txt`
do
    git revert $i --no-commit
done

This reverts everything back to the previous state, including file and directory creations, and deletions, commit it to your branch and you retain the history, but you have it reverted back to the same file structure. Why Git doesn't have a git revert --to <hash> is beyond me.

Here is a much simpler way to go back to a previous commit (and have it in an uncommited state, to do with it whatever you like):

git reset HEAD~1

So, no need for commit ids and so on :)

Caution! This command can cause losing commit history, if user put the wrong commit mistakenly. Always have en extra backup of your git some where else just in case if you do mistakes, than you are a bit safer. :)

I have had a similar issue and wanted to revert back to an earlier commit. In my case I was not interested to keep the newer commit, hence I used Hard.

This is how I did it:

git reset --hard CommitId && git clean -f

This will revert on the local repository, and here after using git push -f will update the remote repository.

git push -f

For instance, if you want to completely ignore the commit with the name enforce non-group manage policies from the next image

you'd run

git reset --hard dd52eb9 && git clean -f

followed by

git push -f

After, you won't see that commit (enforce non-group manage policies) there

You can complete all these initial steps yourself and push back to the Git repository.

1. Pull the latest version of your repository from Bitbucket using the git pull --all command.

2. Run the Git log command with -n 4 from your terminal. The number after the -n determines the number of commits in the log starting from the most recent commit in your local history.

   $ git log -n 4
   

3. Reset the head of your repository's history using the git reset --hard HEAD~N where N is the number of commits you want to take the head back. In the following example the head would be set back one commit, to the last commit in the repository history:

4. Push the change to Git repository using git push --force to force push the change.

If you want the Git repository to a previous commit:-

git pull --all
git reset --hard HEAD~1
git push --force

Revert is the command to rollback the commits.

git revert <commit1> <commit2> 

Sample:

git revert 2h3h23233

It is capable of taking range from the HEAD like below. Here 1 says "revert last commit."

git revert HEAD~1..HEAD

And then do:

git push

After all the changes, when you push all these commands, you might have to use:

git push -f ...

And not only git push.

There is a command (not a part of core Git, but it is in the git-extras package) specifically for reverting and staging old commits:

git undo

Per the man page, it can also be used as such:

# Remove the latest three commits
git undo 3

If the situation is an urgent one, and you just want to do what the questioner asked in a quick and dirty way, assuming your project is under a directory called, for example, "my project":

QUICK AND DIRTY: depending on the circumstances, quick and dirty may in fact be very GOOD. What my solution here does is NOT replace irreversibly the files you have in your working directory with files hauled up/extracted from the depths of the git repository lurking beneath your .git/ directory using fiendishly clever and diabolically powerful git commands, of which there are many. YOU DO NOT HAVE TO DO SUCH DEEP-SEA DIVING TO RECOVER what may appear to be a disastrous situation, and attempting to do so without sufficient expertise may prove fatal.

1. Copy the whole directory and call it something else, like "my project - copy". Assuming your git repository ("repo") files are under the "my project" directory (the default place for them, under a directory called ".git"), you will now have copied both your work files and your repo files.

2. Do this in the directory "my project":

    .../my project $ git reset --hard [first-4-letters&numbers-of-commit's-SHA]
   

This will return the state of the repo under "my project" to what it was when you made that commit (a "commit" means a snapshot of your working files). All commits since the "resetted" commit will be lost forever under "my project", BUT... they will still be present in the repo under "my project - copy" since you copied all those files - including the ones in the repo, under .../.git/.

You then have two versions on your system... you can examine or copy or modify files of interest, or whatever, from the previous commit. You can completely discard the files under "my project - copy", if you have decided the new work since the restored commit was going nowhere...

The obvious thing if you want to carry on with the state of the project without actually discarding the work since this retrieved commit is to rename your directory again: Delete the project containing the retrieved commit (or give it a temporary name) and rename your "my project - copy" directory back to "my project". Then maybe try to understand some of the other answers here, and probably do another commit fairly soon.

Git is a brilliant creation but absolutely no-one is able to just "pick it up on the fly": also people who try to explain it far too often assume prior knowledge of other VCS [Version Control Systems] and delve far too deep far too soon, and commit other terrible crimes, like using interchangeable terms for "checking out" - in ways which sometimes appear almost calculated to confuse a beginner.

To save yourself much stress, learn from my scars. You have to pretty much have to read a book on Git - I'd recommend reading THE BOOK, Pro Git 2nd edition: available for free download etc. from git central. Published 2014 but, as at early 2022, still the best. Do it sooner rather than later: Git is destined to be part of your life from now on. If you do, bear in mind that much of the complexity of Git comes from branching and then remerging: the Pro Git book actually introduces this central aspect very gently, but you can skip those parts in any book on your first read. From your question there's no reason why people should be blinding you with science.

Especially if, for example, this is a desperate situation and you're a newbie with Git!

PS: (slight caution) One other thought: It is (now) actually quite simple to keep the Git repo in a directory other than the one with the working files. This would mean you would not copy the entire Git repository using the above quick & dirty solution. See the answer by Fryer using --separate-git-dir here. Bearing that in mind, be warned: If you have a "separate-directory" repository which you don't copy, and you do a hard reset, all versions subsequent to the reset commit really will be lost forever forever, unless you have, as you absolutely should, regularly backed up your repository, preferably to the Cloud (e.g. Google Drive) among other places.

On this subject of "backing up to the Cloud", the next step is to open an account (free of course) with GitHub or (better in my view) GitLab. You can then regularly do a git push command to make your Cloud repo up-to-date "properly". But again, talking about this may be too much too soon: git push has to be configured, can fail to work for a totally baffling technical reason, involves learning about remote repos ("origin", etc). So a quick-and-dirty Cloud-based backup approach may be preferable until you become knowledgeable. Again, the Pro Git book introduces how remote repositories work, and relate to your local repo, very gently and rationally.

Try resetting to the desired commit:

git reset <COMMIT_ID>

To check COMMIT_ID use:

git log

This will reset all changed files to un-added state.

Now you can checkout all un-added files by

git checkout .

To verify your changes use:

git log

UPDATE

If you have one and only commit in your repo, try

git update-ref -d HEAD

Select your required commit, and check it by

git show HEAD
git show HEAD~1
git show HEAD~2 

till you get the required commit. To make the HEAD point to that, do

git reset --hard HEAD~1

or git reset --hard HEAD~2 or whatever.

Revert to most recent commit and ignoring all local changes:

git reset --hard HEAD

Idea: You basically want to replace the current working tree state with the one from a previous commit and then create a commit out of it. Ignored files should best be not changed. Here is how:

1. Emtpy the working tree *.

    git rm -r --cached . && git clean -f -d
   

2. Bring the working tree in the state we want **.

    git checkout 0d1d7fc3 .
   

3. Create the revert commit.

    git add --all && git commit -m "revert to 0d1d7fc3"
   

At first I thought that Yarins answer would be the best, but it doesn't work for merge commits. This solution does.

Additionally it does not delete anything (pushed or upushed) from the history. It produces one clean commit which represents the state we want to revert back to.

_{* by removing untracked but not ignored files (the ones specified in .gitignore) from working tree. The working tree is empty except for the ignored files which we wanted to keep (if not specifiy -x option for clean)}

_{** When a path is specified (here: .), checkout leaves HEAD alone.}

This is one more way to directly reset to a recent commit

git stash
git stash clear

It directly clears all the changes that you have been making since the last commit.

PS: It has a little problem; it also deletes all you recently stored stash changes. Which I guess in most cases should not matter.

To completely clean a coder's directory up from some accidental changes, we used:

git add -A .
git reset --hard HEAD

Just git reset --hard HEAD will get rid of modifications, but it won't get rid of "new" files. In their case they'd accidentally dragged an important folder somewhere random, and all those files were being treated as new by Git, so a reset --hard didn't fix it. By running the git add -A . beforehand, it explicitly tracked them all with git, to be wiped out by the reset.

I believe some people may come to this question wanting to know how to rollback committed changes they've made in their master - ie throw everything away and go back to origin/master, in which case, do this:

git reset --hard origin/master

https://superuser.com/questions/273172/how-to-reset-master-to-origin-master

To keep the changes from the previous commit to HEAD and move to the previous commit, do:

git reset <SHA>

If changes are not required from the previous commit to HEAD and just discard all changes, do:

git reset --hard <SHA>

As your commits are pushed remotely, you need to remove them. Let me assume your branch is develop and it is pushed over origin.

You first need to remove develop from origin:

git push origin :develop (note the colon)

Then you need to get develop to the status you want, let me assume the commit hash is EFGHIJK:

git reset --hard EFGHIJK

Lastly, push develop again:

git push origin develop

If you want to correct some error in the last commit a good alternative would be using git commit --amend command. If the last commit is not pointed by any reference, this will do the trick, as it create a commit with the same parent as the last commit. If there is no reference to the last commit, it will simply be discarded and this commit will be the last commit. This is a good way of correcting commits without reverting commits. However it has its own limitations.