Criei o repositório local e remoto com sucesso.
Tentei executar o push usando tanto
git push origin master
git push -u origin master
Ocorre o mesmo erro:
$ git push -u origin master To https://github.com/caetanoc/curso-git.git ! [rejected] master -> master (non-fast-forward) error: failed to push some refs to 'https://github.com/caetanoc/curso-git.git' hint: Updates were rejected because the tip of your current branch is behind hint: its remote counterpart. Integrate the remote changes (e.g. hint: 'git pull ...') before pushing again. hint: See the 'Note about fast-forwards' in 'git push --help' for details.