Reset remote to an earlier commit
https://www.lukeko.com/35/reset-remote-to-an-earlier-commit 0git reset --soft 64ad84e
git commit -m "squashing a lot of commits"
git push -f heroku master
Of course, don't do this if there's more than one git collaborator in which case revert
like this https://www.lukeko.com/35/undoing-changes