如何解决failed to push some refs to

描述：
我在做项目的时候，把README.md文件给改名了。
git push上传的时候，出现以下报错

To git@github.com:ls506507881/cv.git
 ! [rejected]        master -> master (fetch first)
error: failed to push some refs to 'git@github.com:ls506507881/cv.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.

----------------------------------------------------------------------------

借用翻译器
To git@github.com:xxx/xx.git
 ! [rejected]        master -> master (fetch first)
error: failed to push some refs to 'git@github.com:xxx/xx.git'
//错误：push到这个仓库失败了

hint: Updates were rejected because the remote contains work that you do
提示：更新被拒绝，因为远程包含您所做的工作。

hint: not have locally. This is usually caused by another repository pushing        
提示：本地没有。这通常是由另一个存储库推送引起的。

hint: to the same ref. You may want to first integrate the remote changes
提示：同样的参考文献。您可能需要首先集成远程更改。

hint: (e.g., 'git pull ...') before pushing again.
提示：(例如，‘git拉...’)之前再推。

hint: See the 'Note about fast-forwards' in 'git push --help' for details.
提示：有关细节，请参阅“git推送--帮助”中的“关于快速转发的注意事项”。

好吧。。。还是不知道怎么解决，于是百度查找别人是怎么解决的。。

1.没有本地的README.md文件

新建README.md文件，再次上传，还是报错。

2.尝试把当前分支代码上传到master分支上。

$ git push -u origin master

但依然没能解决问题

3.、github中的README.md文件不在本地代码目录中

可以通过如下命令进行代码合并【注：pull=fetch+merge]

git pull --rebase origin master
//执行代码后可以看到本地代码库中多了README.md文件

此时再执行语句 git push -u origin master即可完成代码上传到github