解决git-for-windows官网下载速度慢的问题
在官网https://git-scm.com/download/win下载git-for-windows，访问的是github的地址https://github.com/git-for-windows/git/releases/download/v2.25.0.windows.1/Git-2.25.0-64-bit.exe
国内访问github速度较慢，可以访问https://npm.taobao.org/mirrors/git-for-windows/下载