! [rejected] master -> master (fetch first) error: failed to push some refs to 'https://github.com/AvidHaus/shut_up.git' code example

Example 1: ! [rejected] master -> master (fetch first)

git fetch origin master
git merge origin master

Example 2: ! [rejected] master -> master (fetch first) error: failed to push some refs to '

git fetch origin master:tmp
git rebase tmp
git push origin HEAD:master
git branch -D tmp