记录一下亲测有效的解决github clone时，443的问题
访问地址1，记录ip
https://ipaddress.com/website/github.com
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访问地址2，记录ip
https://ipaddress.com/website/github.global.ssl.fastly.net#ipinfo
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访问地址3，记录ip
https://ipaddress.com/website/assets-cnd.github.com
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修改host文件 sudo vi /etc/hosts
140.82.112.3 github.com
199.232.69.194 github.global.ssl.fastly.net
185.199.108.153 assets-cdn.github.com
185.199.109.153 assets-cdn.github.com
185.199.110.153 assets-cdn.github.com
185.199.111.153 assets-cdn.github.com
MacOS Sierra清除dns缓存
sudo killall -HUP mDNSResponder;say DNS cache has been flushed
然后重复clone操作，解决啦。
