how to get rid of commits in git code example

Example 1: get unpushed commits

git log origin/master..HEAD

Example 2: git delete local commit

git reset --hard origin/<branch_name>

Example 3: git clear commits

git reset --hard origin

Example 4: how to delete old commits in github

git reset --hard HEAD^
git push origin -f

Example 5: 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