当我们在利用git push 文件到仓库时出现了一下问题：
! [rejected] master -> master (fetch first)
error: failed to push some refs to 'git@github.com:yaogengzhu/ajax.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.
解决办法：
1.强制上传 git push -f //git仓库地址 master （但是经过的测试 ，这个办法好像会覆盖掉仓库的文件！谨慎使用！）
2.方法二：a)可以通过如下命令进行代码合并 git pull --rebase //仓库地址 master
b) 然后 通过 git push //仓库地址 master （办法可以成功的push 文件！且仓库文件不受影响！建议使用）
目前我掌握就这两个方法~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
