解决方法：
1.打开hosts文件
sudo vim /etc/hosts
2.输入以下内容，然后esc :wq保存。
199.232.28.133 raw.githubusercontent.com
3.重新执行命令
- githubusercontent connect Failed 443 comgithubusercontent connect failed 443 githubusercontent laradock com 443 githubusercontent connect failed to ps-github-com-failed-to-connect-t github github-fatal-unable-to-access-htt ps-github-com-failed-to-connect-t wininet_e_cannot_connect githubusercontent distributioninfo github 443错误connect gateway failed bind 443 github connection com connect github com git connect