edu-git-cocoapods-specs 下载

cd ~/.cocoapods/repos

git config http.postBuffer 5242880000

git clone https://gitclub.cn/CocoaPods/Specs

or 

git clone https://mirrors.tuna.tsinghua.edu.cn/git/CocoaPods/Specs.git master

or

git clone --depth 1 https://github.com/CocoaPods/Specs.git master

完成后将master改名为edu-git-cocoapods-specs