Reverting a commit on a remote.

Resetting remote commits - then Recovering Reset Hard commit

If you want to remove a commit on remote, because you've reset --hard to an earlier commit,

You want to discard all changes done after commit <commit-hash> do:

git reset --hard <commit-hash> git push -f origin master

You're going to lose your local commits if you've already committed. To recover recently deleted commits before garbage collection gets it, use:

git fsck --cache --no-reflogs --lost-found --unreachable HEAD

Now you want to checkout the state of each file using:

git show <commit-hash>

Now you want to reset --hard to the <commit-hash> that you found. Push your changes to remote.