Undo pushed commits in git...

gitundo.txt

git revert <SHA>
git push

This is Git's safest, most basic "undo" scenario, because it doesn't alter history—so you can now git push the new "inverse" commit to undo your mistaken commit.

git reset <last good SHA> or git reset --hard <last good SHA>
git push -f

git reset rewinds your repository's history all the way back to the specified SHA. It's as if those commits never happened. By default, git reset preserves the working directory. The commits are gone, but the contents are still on disk. This is the safest option, but often, you'll want to "undo" the commits and the changes in one move—that's what --hard does

reference: https://github.com/blog/2019-how-to-undo-almost-anything-with-git