当我执行Pod更新时，如何跳过预下载？

我有Podfile，其中包含一个pod pod 'EaseMobSDKFull', :git => 'https://github.com/easemob/sdk-ios-cocoapods-integration.git'. 当我执行时pod update，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将花费很长时间。因此，如何跳过此步骤？请帮帮我！