[!] /usr/local/bin/git clone https://github.com/rs/SDWebImage.git /var/folders/rz/65l6c6d11zgcpbfhlvvtf7rw0000gp/T/d20151104-52814-ikd417 --single-branch --depth 1 --branch 3.7.3 Cloning into ‘/var/folders/rz/65l6c6d11zgcpbfhlvvtf7rw0000gp/T/d20151104-52814-ikd417‘... fatal: unable to access ‘https://github.com/rs/SDWebImage.git/‘: Failed to connect to github.com port 443: Operation timed out
安装 Pod 时遇到的问题，输入用户名和密码。
原文：http://www.cnblogs.com/jaxer/p/4935458.html