我遇到了一个错误，并且在Google上进行了很多搜索，似乎没有任何效果。我已经尝试过提取，拉，推，变基，并且在堆栈溢出方面做了很多尝试。我还重新整理了回购协议，看看是否有帮助，但没有任何帮助。
! [rejected] master -> master (fetch first)
error: failed to push some refs to 'https://git.heroku.com/repo.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.