$ git clone git://git.debian.org/git/pbuilder/pbuilder.git
$ cd pbuilder
# patch is against debian/0.213
$ git checkout <revision-you-want-to-build-against>
# patching debian/changelog should fail when not building against revision
# debian/0.213; this is ok, but don't remove debian/changelog.rej; you will
# need it when you want to copy the changelog entry from it
$ patch -p1 <<path-to>/propagate-path-to-dpkg-buildpackage.diff
# unless building against revision debian/0.213 add the changelog entry from
# debian/changelog.rej
$ dch
$ $FAVOURITE-PACKAGE-BUILDER
