当我执行pod更新时，如何跳过预先下载？

Question

我有Podfile，其内容是一个广告pod 'EaseMobSDKFull', :git => 'https://github.com/easemob/sdk-ios-cocoapods-integration.git'. 当我执行pod update时，它将是exec

 -> Pre-downloading: `EaseMobSDKFull` from `https://github.com/easemob/sdk-ios-cocoapods-integration.git`
 > Git download
 > Git download
     $ /usr/bin/git clone
     https://github.com/easemob/sdk-ios-cocoapods-integration.git
     /var/folders/sv/.../T/...
     --single-branch --depth 1
     Cloning into '/var/folders/sv/.../T/...'...

下载git会花很长时间。所以，如何跳过这一步？请帮帮我！