修改Host文件
# Github 151.101.44.249 github.global.ssl.fastly.net 192.30.253.113 github.com 103.245.222.133 assets-cdn.github.com 23.235.47.133 assets-cdn.github.com 203.208.39.104 assets-cdn.github.com 204.232.175.78 documentcloud.github.com 204.232.175.94 gist.github.com 107.21.116.220 help.github.com 207.97.227.252 nodeload.github.com 199.27.76.130 raw.github.com 107.22.3.110 status.github.com 204.232.175.78 training.github.com 207.97.227.243 www.github.com 185.31.16.184 github.global.ssl.fastly.net 185.31.18.133 avatars0.githubusercontent.com 185.31.19.133 avatars1.githubusercontent.com 192.30.253.120 codeload.github.com
刷新DNS 在命令工具栏键入以下内容
ipconfig /flushdns