how to restore back to an old git commit code example

Example 1: github restore previous commit

# syntax
git revert <commit>
# example
git revert 99a5c5905e12c74725bae64c61efce140662ce24
# where 99a5c59... is the commit (you can check it on github)

Example 2: git revert to old commit

git reset --hard c14809fa