Answers for "! [rejected] master -> master (fetch first)"

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

git init
git add README.md
git add .
git commit -m "first commit"
git remote add origin https://github.com/userName/repoName.git
git push --force origin master

! [rejected] master -> master (fetch first)

git fetch origin master
git merge origin master

! [rejected] master -> master (fetch first)

git fetch
//then do 
git merge

! [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