Getting access to branches in linked repositories on Github
===

I have a github repository pedz/ruby which is a fork from shyouhei/ruby which is a fork from ruby/ruby.

ruby/ruby has a branch called 1_9_3 that shyouhei/ruby does not have.

Is there a way for me to get access to the 1_9_3 branch of ruby/ruby?

Note that I can not fork ruby/ruby -- at least I don't know how.  The normal "fork" button has been replied with a "your fork" button when I'm on the ruby/ruby page.  Hitting that button puts me on my pedz/ruby page.
