rejected Updates were rejected because the tip of your current

rejected Updates were rejected because the tip of your current branch is behind its remote counterpart. Integrate the remote changes  before pushing again.

这个错误说明远程和本地库有冲突；

有如下几种解决方法：

1.使用强制push的方法：

$ git push -u origin master -f 

这样会使远程修改丢失，一般是不可取的，尤其是多人协作开发的时候。

2.push前先将远程repository修改pull下来

$ git pull origin master

$ git push -u origin master

3.若不想merge远程和本地修改，可以先创建新的分支：

$ git branch [name]

然后push

$ git push -u origin [name]