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

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

error: failed to push some refs to 'https://github.com/jyshin0926/StudyLoop.git'

hint: Updates were rejected because the remote contains work that you do

hint: not have locally. This is usually caused by another repository pushing

hint: to the same ref. You may want to first integrate the remote changes

hint: (e.g., 'git pull ...') before pushing again.

hint: See the 'Note about fast-forwards' in 'git push --help' for details.

git push 했을 때 나온 에러로 결론적으로는 기존 데이터가 손실이 있을 수 있어서 진행이 안 되게 하는 것!

 

git push origin +master

위 명령으로 강제 push가 가능하지만, 기존 데이터는 보장 못 한다.