Cocoapods和forked repo问题

所以这是我的podfile:

workspace 'WSPhoto.xcworkspace'
platform :ios, :deployment_target => "6.1"

xcodeproj 'WSPhoto'

pod 'Parse-iOS-SDK', '~> 1.2.17'
pod 'REActivityViewController',  :git => 'https://github.com/ramsel/REActivityViewController.git', :commit => 'f027011e8159393cf678d7c67c408891b609a6ef'
pod 'SWTableViewCell', :git => 'https://github.com/ramsel/SWTableViewCell.git', :commit => '6f4e55e554c1b26ff3c850eb331273b536e4f900'
pod 'ELCImagePickerController', '~> 0.2.0'
pod 'ChimpKit'

我正在根据前一个问题中的建议分配一些repos并将Cocoapods指向我的forks的特定提交:

CocoaPods和GitHub分叉

但是,我收到以下错误pod install --verbose:

Fetching external sources
-> Pre-downloading: `REActivityViewController` from `https://github.com/ramsel/REActivityViewController.git`, commit `f027011e8159393cf678d7c67c408891b609a6ef`
 > GitHub download
   $ /usr/bin/git config core.bare
   true
   $ /usr/bin/git config core.bare
   true
   $ /usr/bin/git rev-list --max-count=1
   f027011e8159393cf678d7c67c408891b609a6ef
   fatal: bad object f027011e8159393cf678d7c67c408891b609a6ef
   [!] Failed: /usr/bin/git rev-list --max-count=1
   f027011e8159393cf678d7c67c408891b609a6ef
 > Cloning to Pods folder
     $ /usr/bin/git clone
     "/Users/admin/Library/Caches/CocoaPods/GitHub/4a2fb7e9e50f5b0922a251d6b2763
     d6d37629fda"
     "/Users/admin/Dropbox/Apps/things/Pods/REActivityViewController"
     Cloning into '/Users/admin/Dropbox/Apps/things/Pods/REActivityViewController'...
     done.
     Checking connectivity... done
   $ /usr/bin/git checkout -b activated-pod-commit
   f027011e8159393cf678d7c67c408891b609a6ef 2>&1
   fatal: reference is not a tree: f027011e8159393cf678d7c67c408891b609a6ef
[!] Pod::Executable checkout -b activated-pod-commit f027011e8159393cf678d7c67c408891b609a6ef 2>&1

fatal: reference is not a tree: f027011e8159393cf678d7c67c408891b609a6ef

我尝试引用一个不同的我的分叉REActivityViewController但同样的错误.我REActivityViewController在podfile中注释掉了这行,并且SWTableViewCell的fork安装得很好.

所以我认为它对我的REActivityViewControllerfork来说是特别的,但它并不特定于该fork中的特定提交.