how to delete a commit in github locally code example

Example 1: delete commit

git checkout master
git reset --hard e3f1e37
git push --force origin master
# Then to prove it (it won't print any diff)
git diff master..origin/master

Example 2: git discard all unpushed commits

# Remove ALL commits up to commit hash.
# NB: Make sure these commits have not been pushed.

git reset --hard <commit hash number>