安装homebrew报错curl: (7) Failed to connect to raw.githubusercontent.com port 443: Connection refused

安装homebrew的时候，在终端输入 /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" 提示： curl: (7) Failed to connect to raw.githubusercontent.com port 443: Connection

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