解决fatal: unable to access 'https://github.com/brocaar/chirpstack-docker.git/': Failed connect to github.com:443; Connection refused

解决方法（2步 ）

输入git config --global --unset http.proxy
输入git config --global --unset https.proxy

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[root@localhost ~]# git clone https://github.com/brocaar/chirpstack-docker.git 正克隆到 'chirpstack-docker'... remote: Enumerating objects: 271, done. remote: Counting objects: 100% (98/98), done. remote: Compressing objects: 100% (36/36), done. remote: Total 271 (delta 77), reused 68 (delta 62), pack-reused 173 接收对象中: 100% (271/271), 54.88 KiB | 0 bytes/s, done. 处理 delta 中: 100% (141/141), done.