mxcl/homebrew — pull request #12263 by mcolyer (2012-05-15 18:56:27+00:00)
Title: Pass ssh-agent information to Jenkins in the plist 

If you use Jenkins to build repositories that require SSH access, it isn't able to access the keys available through the ssh-agent which means that it most likely fails.

This is my best guess on how to fix it and it seems to work for me. If there is a better way to do this, I'm all for it.