How to remove unneeded git commits?

Question

I have some garbage commits in my git repositry. These have been created by e.g. the git gui when changing the latest commit again and accidently creating additional commits

Answer 1

Try this:

git reflog expire --expire=now
git gc --prune=now

Answer 2

Do the below:

git config gc.reflogexpireUnreachable now
git gc --prune=now
git config --unset gc.reflogexpireUnreachable