国内访问github速度较慢，代码克隆和Releases下载也很慢，好在有"镜像网站"
https://github.com.cnpmjs.org
https://hub.fastgit.org
https://gitclone.com
2021/05/06更新，增加一个⬇️
https://github-dotcom.gateway.web.tr/

简单替换url就可以使用了

1、仓库克隆

git clone https://github.com/torvalds/linux.git
#改为如下
git clone https:///github.com.cnpmjs.org/torvalds/linux.git
git clone https://hub.fastgit.org/torvalds/linux.git
git clone https://gitclone.com/torvalds/linux.git      

2、Releases下载

wget https://github.com/git/git/archive/v2.28.0.zip
# 改为如下
wget https:///github.com.cnpmjs.org/git/git/archive/v2.28.0.zip
wget https://hub.fastgit.org/git/git/archive/v2.28.0.zip