revert commit github website 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: github undo last pushed commit

git reset <previous label or sha1>
git commit -am "blabla"
git push -f <remote-name> <branch-name>