解决git push报错：Updates were rejected because the remote contains work that you do not have locally

问题现象：

| $ git push origin dev
To http://xxxxxx/Android.git
! [rejected] dev -> dev (fetch first)
error: failed to push some refs to 'http://xxxxxx/Android.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.

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问题原因：

其他地方向同一远端库推送了代码，导致本地不是最新的。

解决方案：

先从远端pull一下，执行：git pull