fatal: unable to access 'https://github.com/haoluckcn/react-study.git/': LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to github.com:443
这种情况可能是因为设置了系统代理, 取消全局代理即可, 亲测有效
git config --global --unset http.proxy
git config --global --unset https.proxy