pull request trick

1.9.3:knife-rackspace [master]$ git config --add remote.upstream.fetch "+refs/pull/*/head:refs/remotes/upstream/pr/*"
1.9.3:knife-rackspace [master]$ git fetch upstream
remote: Counting objects: 481, done.
remote: Compressing objects: 100% (223/223), done.
remote: Total 393 (delta 191), reused 309 (delta 113)
Receiving objects: 100% (393/393), 45.29 KiB, done.
Resolving deltas: 100% (191/191), completed with 20 local objects.
From https://github.com/opscode/knife-rackspace
 * [new ref]         refs/pull/0/head -> upstream/pr/0
 * [new ref]         refs/pull/1/head -> upstream/pr/1
 * [new ref]         refs/pull/10/head -> upstream/pr/10
 * [new ref]         refs/pull/11/head -> upstream/pr/11
 * [new ref]         refs/pull/12/head -> upstream/pr/12
 * [new ref]         refs/pull/13/head -> upstream/pr/13
 * [new ref]         refs/pull/14/head -> upstream/pr/14
 * [new ref]         refs/pull/15/head -> upstream/pr/15
 * [new ref]         refs/pull/16/head -> upstream/pr/16
 * [new ref]         refs/pull/17/head -> upstream/pr/17
 * [new ref]         refs/pull/18/head -> upstream/pr/18
 * [new ref]         refs/pull/19/head -> upstream/pr/19
 * [new ref]         refs/pull/2/head -> upstream/pr/2
 * [new ref]         refs/pull/20/head -> upstream/pr/20
 * [new ref]         refs/pull/21/head -> upstream/pr/21
 * [new ref]         refs/pull/22/head -> upstream/pr/22
 * [new ref]         refs/pull/23/head -> upstream/pr/23
 * [new ref]         refs/pull/24/head -> upstream/pr/24
 * [new ref]         refs/pull/25/head -> upstream/pr/25
 * [new ref]         refs/pull/26/head -> upstream/pr/26
 * [new ref]         refs/pull/27/head -> upstream/pr/27
 * [new ref]         refs/pull/28/head -> upstream/pr/28
 * [new ref]         refs/pull/29/head -> upstream/pr/29
 * [new ref]         refs/pull/3/head -> upstream/pr/3
 * [new ref]         refs/pull/30/head -> upstream/pr/30
 * [new ref]         refs/pull/31/head -> upstream/pr/31
 * [new ref]         refs/pull/32/head -> upstream/pr/32
 * [new ref]         refs/pull/33/head -> upstream/pr/33
 * [new ref]         refs/pull/34/head -> upstream/pr/34
 * [new ref]         refs/pull/35/head -> upstream/pr/35
 * [new ref]         refs/pull/36/head -> upstream/pr/36
 * [new ref]         refs/pull/37/head -> upstream/pr/37
 * [new ref]         refs/pull/38/head -> upstream/pr/38
 * [new ref]         refs/pull/39/head -> upstream/pr/39
 * [new ref]         refs/pull/40/head -> upstream/pr/40
 * [new ref]         refs/pull/41/head -> upstream/pr/41
 * [new ref]         refs/pull/42/head -> upstream/pr/42
 * [new ref]         refs/pull/43/head -> upstream/pr/43
 * [new ref]         refs/pull/7/head -> upstream/pr/7
 * [new ref]         refs/pull/8/head -> upstream/pr/8
 * [new ref]         refs/pull/9/head -> upstream/pr/9
1.9.3:knife-rackspace [master]$ git checkout -b knife-182 upstream/pr/32
Branch knife-182 set up to track remote branch pr/32 from upstream.
Switched to a new branch 'knife-182'
1.9.3:knife-rackspace [knife-182]$ git log -1
commit b01d638e34f481ccb62aef8efcecec48fb54d79f
Author: Matt Ray <[email protected]>
Date:   Mon Nov 26 14:45:48 2012 -0600

    default to 'v2' API, updated logging to show priority

To pull a specific PR

git fetch upstream pull/2087/head:pr_2087