macOs 安裝過homebrew，可是再次執行 brew install 安裝時候一直卡在 homebrew updating....

問題緣由：brew 的源更換了 替換brew.git: cd "$(brew --repo)" git remote set-url origin mirrors.ustc.edu.cn/brew.git

替換homebrew-core.git: cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core" git remote set-url origin mirrors.ustc.edu.cn/homebrew-co…