fatal: unable to access ‘https://github.com/xxx/‘: Failed to connect to 127.0.0.1 port 7890: Connect

git clone 项目的时候遇到报错：

fatal: unable to access 'https://github.com/xxx/': Failed to connect to 127.0.0.1 port 7890: Connect

解决方案：

unset no_proxy;unset https_proxy