解决

多半是被 DNS 污染了，修改： C:\Windows\System32\drivers\etc 内的 hosts 文件直接解析 IP 即可。

添加：

140.82.112.3                  github.com
140.82.114.10                 codeload.github.com
140.82.114.21                 central.github.com
140.82.114.3                  gist.github.com
140.82.114.5                  api.github.com
185.199.108.133               avatars0.githubusercontent.com
185.199.108.133               avatars1.githubusercontent.com
185.199.108.133               avatars2.githubusercontent.com
185.199.108.133               avatars3.githubusercontent.com
185.199.108.133               avatars4.githubusercontent.com
185.199.108.133               avatars5.githubusercontent.com
185.199.108.133               avatars.githubusercontent.com
185.199.108.133               camo.githubusercontent.com
185.199.108.133               desktop.githubusercontent.com
185.199.108.133               favicons.githubusercontent.com
185.199.108.133               github.map.fastly.net
185.199.108.133               media.githubusercontent.com
185.199.108.133               raw.githubusercontent.com
185.199.108.133               user-images.githubusercontent.com
185.199.108.153               assets-cdn.github.com
185.199.108.153               github.io
185.199.108.153               githubstatus.com
185.199.108.154               github.githubassets.com
199.232.69.194                github.global.ssl.fastly.net
52.217.130.41                 github-production-user-asset-6210df.s3.amazonaws.com
52.217.194.41                 github-production-repository-file-5c1aeb.s3.amazonaws.com
52.217.39.124                 github-cloud.s3.amazonaws.com
52.217.73.92                  github-com.s3.amazonaws.com
52.217.76.236                 github-production-release-asset-2e65be.s3.amazonaws.com
64.71.168.201                 github.community
api.github.com 140.82.112.6
avatars0.githubusercontent.com 185.199.108.133
avatars1.githubusercontent.com 185.199.108.133
avatars2.githubusercontent.com 185.199.108.133
avatars3.githubusercontent.com 185.199.108.133
avatars4.githubusercontent.com 185.199.108.133
avatars5.githubusercontent.com 185.199.108.133
camo.githubusercontent.com 185.199.108.133
favicons.githubusercontent.com 185.199.108.133
# GitHub520 Host End
# GitHub520 Host Start
github.com 140.82.113.3
github.githubassets.com 185.199.108.154
github.global.ssl.fastly.net 199.232.69.194
# Github Host End
#Github Host Start
github.map.fastly.net 185.199.108.133
raw.githubusercontent.com 185.199.108.133
# Star me GitHub url: https://github.com/521xueweihan/GitHub520
# Update time: 2021-03-25T10:11:47+08:00