how to access the new-release candidate (1.9)

[Chris Smith]

Can anyone help me? I would like to make a commit toward 1.9 but don't know how to access that branch. 

My .gitconfig looks like this:

[branch "master"]

    remote = origin

    merge = refs/heads/master

[remote "origin"]

    url = git://github.com/sympy/sympy.git

    fetch = +refs/heads/*:refs/remotes/origin/*

    fetch = +refs/pull/*/head:refs/remotes/origin/pr/*

I am comfortable with git pull, git checkout origin/pr/###, but don't know how to set-up the upstream as you suggested. @asmeurer is usually the one that helps me out of such situations :-)

Thanks for any help.

/c