How to reset a commit

You could follow these steps to revert the incorrect commit(s) or to reset your remote branch back to correct HEAD/state.

1.checkout the remote branch to local repo.

git checkout your_branch_name

2.copy the commit hash

(i.e. id of the commit immediately before the wrong commit) from git log

git log -n5

should show something like this:

commit 7cd42475d6f95f5896b6f02e902efab0b70e8038 "Merge branch 'wrong-commit' into 'your_branch_name'"
commit f9a734f8f44b0b37ccea769b9a2fd774c0f0c012 "this is a wrong commit" 
commit 3779ab50e72908da92d2cfcd72256d7a09f446ba "this is the correct commit"

3.reset the branch to the commit hash copied in the previous step

git reset  (i.e. 3779ab50e72908da92d2cfcd72256d7a09f446ba)

4.run the git status to show all the changes that were part of the wrong commit.

5.simply run git reset --hard to revert all those changes.

6.force-push your local branch to remote and notice that your commit history is clean as it was before it got polluted.

git push -f origin your_branch_name

The end.