GitHub仍不支持IPv6，但是可以使用指定host到代理服务器实现

cat >> /etc/hosts << EOF
# https://danwin1210.de/github-ipv6-proxy.php
2a01:4f8:c010:d56::2 github.com
2a01:4f8:c010:d56::3 api.github.com
2a01:4f8:c010:d56::4 codeload.github.com
2a01:4f8:c010:d56::5 objects.githubusercontent.com
2a01:4f8:c010:d56::6 ghcr.io
2a01:4f8:c010:d56::7 pkg.github.com npm.pkg.github.com maven.pkg.github.com nuget.pkg.github.com rubygems.pkg.github.com
EOF

参考资料：
https://danwin1210.de/github-ipv6-proxy.php
https://www.nodeseek.com/post-57839-1