Design and skeleton thanks to schacon/git-pulls and b4mboo/git-review.

git-forks

Get info about a GitHub project's forks.

$ git forks update
Retrieving the latest GitHub data...

$ git forks list
--------------------------------------------------------------------------------
Forks of 'doubleotoo/foo'

Owner                    Branches    Updated
------                   --------    -------
justintoo                2           01-May-12
rose-compiler            3           27-Apr-12

$ git forks list --reverse
--------------------------------------------------------------------------------
Forks of 'doubleotoo/foo'

Owner                    Branches    Updated
------                   --------    -------
rose-compiler            3           27-Apr-12
justintoo                2           01-May-12

$ git forks show justintoo
--------------------------------------------------------------------------------
Owner    : justintoo
Created  : 01-May-12
Updated  : 01-May-12
Branches : 2
  444a867d338cafc0c82d058b458b4fe268fa14d6 master
  14178fe5b204c38650de8ddaf5d9fb80aa834e74 foo

$ git forks browse justintoo
> launch web browser to view in GitHub

$ git forks browse justintoo:test-branch
> launch web browser to view in GitHub

$ git forks browse justintoo:c4a8c4aef3814e74f79a1f8a4894618b49ad7486
> launch web browser to view in GitHub

$ git forks fetch
Retrieving the latest GitHub data...
--------------------------------------------------------------------------------
Fething Git data from fork 'justintoo/foo'
From https://github.com/justintoo/foo
 * [new branch]      foo        -> refs/forks/justintoo/foo/foo
 * [new branch]      master     -> refs/forks/justintoo/foo/master
--------------------------------------------------------------------------------
Fething Git data from fork 'rose-compiler/foo'
remote: Counting objects: 12, done.
remote: Compressing objects: 100% (4/4), done.
remote: Total 7 (delta 1), reused 7 (delta 1)
Unpacking objects: 100% (7/7), done.
From https://github.com/rose-compiler/foo
 * [new branch]      master     -> refs/forks/rose-compiler/master
 * [new branch]      rosecompiler-rc -> refs/forks/rose-compiler/rosecompiler-rc

$ git forks fetch justintoo
Retrieving the latest GitHub data...
--------------------------------------------------------------------------------
Fething Git data from fork 'justintoo/foo'
From https://github.com/justintoo/foo
 * [new branch]      foo        -> refs/forks/justintoo/foo
 * [new branch]      master     -> refs/forks/justintoo/master

Configure which forks you are interested in:

$ git forks config list

$ git forks config add justintoo
Added justintoo

$ git forks config add rose-compiler
Added rose-compiler

$ git forks config list
justintoo
rose-compiler

$ git forks config remove rose-compiler
Removed rose-compiler.

$ git forks config get rose-compiler

Installation

To install it via Rubygems, you might need to add Gemcutter to your Rubygems sources:

gem install gemcutter --source http://gemcutter.org

Afterwards simply do:

gem install git-forks

(Prefix with sudo if necessary)