Makes merging PRs easier, e.g.: git merge refs/pull/upstream/1234 (source).
[core]
repositoryformatversion = 0
filemode = true
bare = false
logallrefupdates = true
ignorecase = true
precomposeunicode = true
[remote "origin"]
url = https://github.com/cadus/keystone
fetch = +refs/heads/*:refs/remotes/origin/*
[branch "master"]
remote = origin
merge = refs/heads/master
[remote "upstream"]
url = https://github.com/keystonejs/keystone.git
fetch = +refs/heads/*:refs/remotes/upstream/*
fetch = +refs/pull/*/head:refs/pull/upstream/*