修改本地host
既然上游服务器的域名地址被修改了，那我们直接在本地hosts文件了指定好域名对应的IP地址不就好了嘛
hosts 文件在每个系统的位置不一，详情如下：
• Windows 系统：C:\Windows\System32\drivers\etc\hosts
• Linux 系统：/etc/hosts
• Mac（苹果电脑）系统：/etc/hosts
• Android（安卓）系统：/system/etc/hosts
• iPhone（iOS）系统：/etc/hosts
然后将下面这些数据拷贝到自己电脑的hosts文件，再激活生效就可以了:

140.82.114.25 alive.github.com
140.82.112.25 live.github.com
185.199.108.154 github.githubassets.com
140.82.112.22 central.github.com
185.199.108.133 desktop.githubusercontent.com
185.199.108.153 assets-cdn.github.com
185.199.108.133 camo.githubusercontent.com
185.199.108.133 github.map.fastly.net
199.232.69.194 github.global.ssl.fastly.net
140.82.112.4 gist.github.com
185.199.108.153 github.io
140.82.114.4 github.com
192.0.66.2 github.blog
140.82.112.6 api.github.com
185.199.108.133 raw.githubusercontent.com
185.199.108.133 user-images.githubusercontent.com
185.199.108.133 favicons.githubusercontent.com
185.199.108.133 avatars5.githubusercontent.com
185.199.108.133 avatars4.githubusercontent.com
185.199.108.133 avatars3.githubusercontent.com
185.199.108.133 avatars2.githubusercontent.com
185.199.108.133 avatars1.githubusercontent.com
185.199.108.133 avatars0.githubusercontent.com
185.199.108.133 avatars.githubusercontent.com
140.82.112.10 codeload.github.com
52.217.223.17 github-cloud.s3.amazonaws.com
52.217.199.41 github-com.s3.amazonaws.com
52.217.93.164 github-production-release-asset-2e65be.s3.amazonaws.com
52.217.174.129 github-production-user-asset-6210df.s3.amazonaws.com
52.217.129.153 github-production-repository-file-5c1aeb.s3.amazonaws.com
185.199.108.153 githubstatus.com
64.71.144.202 github.community
23.100.27.125 github.dev
185.199.108.133 media.githubusercontent.com

大部分情况下是直接生效，如未生效可尝试下面的办法，刷新 DNS：
• Windows：在 CMD 窗口输入：ipconfig /flushdns
• Linux 命令：sudo nscd restart，如报错则须安装：sudo apt install nscd 或 sudo /etc/init.d/nscd restart
• Mac 命令：sudo killall -HUP mDNSResponder
如果还没有生效的话，可以尝试重启一下电脑，毕竟这步操作可以解决 95 % 的电脑bug