Add branch to Vcs-Git header.

debian/changelog

@@ -1,6 +1,7 @@
 dulwich (0.9.7-2) UNRELEASED; urgency=medium
 
   * Require at least Python 2.7. Closes: #753519
+  * Add branch to Vcs-Git header.
 
  -- Jelmer Vernooij <jelmer@debian.org>  Wed, 02 Jul 2014 21:20:48 +0200
 

debian/control

@@ -6,7 +6,7 @@ Homepage: http://samba.org/~jelmer/dulwich
 Build-Depends: python-all-dev (>= 2.6.6-3), python-all-dbg (>= 2.6.6-3), debhelper (>= 9), python-unittest2, git (>= 1:1.7.0.4-2) | git-core, python-fastimport (>= 0.9.0~bzr293)
 Standards-Version: 3.9.5
 X-Python-Version: >= 2.7
-Vcs-Git: git://anonscm.debian.org/users/jelmer/dulwich.git
+Vcs-Git: git://anonscm.debian.org/users/jelmer/dulwich.git -b unstable
 Vcs-Browser: http://anonscm.debian.org/gitweb/?p=users/jelmer/dulwich.git
 XS-Testsuite: autopkgtest