在此之前，更新仓库是可以选定上游仓库的某个tag来进行更新合并代码的，但是现在无论怎么找都找不到了（网页版和桌面版都找了没有了），这么方便的功能，被取消了就很无语。

Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.