I'm trying to delete the last two commits from one of my GitHub repositories. I've tried as suggested here: git push -f origin HEAD^^:master. It seems that it works, as the last two commits are removed.
Then I deleted them from my local repository with git rebase -i HEAD~2. I remove the lines that are related to those commits, and check with git log that they are correctly removed.
After that, I make some changes in my local repository, make a new commit, and push to GitHub. The problem is that, in my GitHub account, I have the previous two commits that I've tried to delete.
I think the problem is in my local repository, because if I clone my GitHub repository to my local and make some changes here, when I push a new commit those old commits aren't pushed to GitHub.
To remove the last two commits locally I'd suggest using:
git reset --hard HEAD^^
Rebase is a completely different operation that won't help you here.