iOS CocoaPods：安装webSocket时出错

Question

我已经从ios下载了WebSocket SDK， https://github.com/elabs/mobile-websocket-example

现在，当我尝试安装可可豆荚时，我收到了以下错误

Analyzing dependencies
[!] An error occurred while performing `git pull` on repo `master`.
[!] /usr/bin/git pull --ff-only

error: RPC failed; result=56, HTTP code = 200

fatal: The remote end hung up unexpectedly

fatal: early EOF

fatal: index-pack failed

请帮助我。

感谢。