修改hosts

C:\Windows\System32\drivers\etc\hosts

在文件末尾添加：

 1# GitHub Start 
 2192.30.253.112    Build software better, together 
 3192.30.253.119    gist.github.com
 4151.101.184.133    assets-cdn.github.com
 5151.101.184.133    raw.githubusercontent.com
 6151.101.184.133    gist.githubusercontent.com
 7151.101.184.133    cloud.githubusercontent.com
 8151.101.184.133    camo.githubusercontent.com
 9151.101.184.133    avatars0.githubusercontent.com
10151.101.184.133    avatars1.githubusercontent.com
11151.101.184.133    avatars2.githubusercontent.com
12151.101.184.133    avatars3.githubusercontent.com
13151.101.184.133    avatars4.githubusercontent.com
14151.101.184.133    avatars5.githubusercontent.com
15151.101.184.133    avatars6.githubusercontent.com
16151.101.184.133    avatars7.githubusercontent.com
17151.101.184.133    avatars8.githubusercontent.com
18# GitHub End

From知乎

2021.01.04更新：

D大介绍的GitHub520更加全面智能，推荐！

Thanks！