Mac 上浏览器可访问github，但命令行 SSH 连接超时
using SSH over 443 port to access Github
tag: Git
git ssh REMOTE HOST IDENTIFICATION HAS CHANGED
Could not read from remote repository
error: git object file .git/objects/xxx is empty 和 fatal: cannot read existing object info
index-pack failed，unable to unlink null bad address
如何删除本地 git 中未追踪的文件/文件夹
git clean/delete untracked files, folders