一、设置git仓库

1、先删除原来仓库

git remote rm origin

2、添加仓库

git remote add origin [url]

注意：若要修改仓库

git remote origin set-url [url]

二、

在使用Git 配置公司的远程仓库时git push origin master，出现以下问题

xu:QProj xiaokai$ git push origin master
To https://gitee.com/XXXXX.git
 ! [rejected]        master -> master (non-fast-forward)
error: failed to push some refs to 'https://gitee.com/XXXXX.git'
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.

从提示语中可以看出是，问题（Non-fast-forward）的出现原因在于：git仓库中已经有一部分代码，所以它不允许你直接把你的代码覆盖上去。于是你有2个选择方式：

(一)、强制推送，即利用强覆盖方式用你本地的代码替代git仓库内的内容，如果远程仓库是刚建的，没有代码，可以这样操作，尽量避免这种操作方法。

git push -f

(二)、

先把git的东西fetch到你本地然后merge后再push

git fetch

git merge

注意：

1、在使用的时候，git merge，又出现了以下的问题

xu:QProj xiaokai$ git merge
fatal: refusing to merge unrelated histories

对于这个问题。使用

git pull origin master --allow-unrelated-histories

然后继续

git merge

,依然有问题

fatal: You have not concluded your merge (MERGE_HEAD exists).
Please, commit your changes before you merge.

这个就好处理了，是我们没有提交当前的变化，

git add .

git commit -m "modify"

然后再来一次

git merge

然后输入

git pull

显示 Already up-to-date.

最后执行

git push origin master

显示

xu:QProj xiaokai$ git push origin master
Counting objects: 693, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (636/636), done.
Writing objects: 100% (693/693), 2.83 MiB | 570.00 KiB/s, done.
Total 693 (delta 362), reused 0 (delta 0)
remote: Resolving deltas: 100% (362/362), completed with 1 local object.
remote: Powered by Gitee.com
To https://gitee.com/XXXXX.git
   83902a5..8100890  master -> master