When I execute exec pod update, how do I skip preloading?

Question

I have a podfile that contains the content. pod 'EaseMobSDKFull', :git => 'https://github.com/easemob/sdk-ios-cocoapods-integration.git'. When I execute exec pod update, it will be 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/...'...

He will spend a lot of time downloading git. So how to skip this step? Please help me!