delete a commit from github

git rebase -i dd61ab23^

This will open and editor showing a list of all commits. Delete the one you want to get rid off. Finish the rebase and push force to repo.

git rebase --continue
git push <<remote>> -f


 574  git reset --hard 2633cabf1b7cfe4561c2781cc666e73fcbfc32c1
  575  git push origin HEAD --force

git rm . -r --cached
git add .
git commit -m "fixed untracked files"