git clone 长时间不响应，错误码443
LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to github.com:443
解决办法：
在git clone命令前面加上 env GIT_SSL_NO_VERIFY=true
env GIT_SSL_NO_VERIFY=true git clone https://github.com/XXX.git
pod install 超时：
Cloning into '/var/folders/hq/b1tbnd911hn_f087h1jqvh1r0000gp/T/d20210409-44255-1b8cf7t'...
error: RPC failed; curl 56 LibreSSL SSL_read: SSL_ERROR_SYSCALL, errno 54
fatal: the remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed
原因上面git clone一样，处理办法也是在pod install前面加env GIT_SSL_NO_VERIFY=true
env GIT_SSL_NO_VERIFY=true pod install
