Note: This repository is deprecated. The gh Homebrew formula has been pushed to the official Homebrew repo. Run brew install gh to install and brew update gh to update.
Just brew tap jingweno/gh and then brew install gh (or brew install jingweno/gh/gh).
To build gh from source, type brew install --build-from-source gh.
You can also build from the latest head with brew install --HEAD gh.
If the formula conflicts with one from mxcl/master or another tap, you
can brew install jingweno/gh/gh.
You can also install via URL:
brew install https://raw.github.com/jingweno/homebrew-gh/master/gh.rb
brew help, man brew, or the Homebrew wiki.