About 'git commit --amend' actually it works on any commit that hasn't been pushed upstream, the speaker talks about for some time, so the more verbose version

About 'git commit --amend' actually it works on any commit that hasn't been pushed upstream, the speaker talks about for some time, so the more verbose version of the command would be 'git commit --amend <SHA Hash>' but all of the previous commits are usually pushed upstream anyway, so effectively this command works only on the last commit. I didn't know about reflog and whatchanged, I'll definitely read up on them. Thanks!