执行下面这俩命令，找到对应的IP，增加host就能解决
nslookup github.global.ssl.fastly.Net
nslookup github.com
root@tao-PC:/var/www/html/go-project/test# nslookup github.global.ssl.fastly.Net
Server: 124.207.160.106
Address: 124.207.160.106#53
Non-authoritative answer:
Name: github.global.ssl.fastly.Net
Address: 66.220.146.94
root@tao-PC:/var/www/html/go-project/test# nslookup github.com
Server: 124.207.160.106
Address: 124.207.160.106#53
Non-authoritative answer:
Name: github.com
Address: 13.229.188.59
找到下面的IP
Non-authoritative answer:
修改host为下面下面的ip
13.229.188.59 github.com
66.220.146.94 github.global.ssl.fastly.net
重启刷新DNS
/etc/init.d/networking restart