$ gbp buildpackage --git-builder=/bin/true --git-pristine-tar --git-ignore-branch --git-upstream-tag=pkg/upstream/4.25
gbp:warning: Pristine-tar branch "pristine-tar" not found
gbp:error: Pristine-tar couldn't checkout "pollinate_4.25.orig.tar.gz": pristine-tar: There's no local pristine-tar branch. Several remote pristine-tar branches exist.
Run "git branch --track pristine-tar <remote>" to create a local pristine-tar branch
bdee21813a6bb585eec687d3e91c94fc184ab267 refs/remotes/pkg/importer/debian/pristine-tar
e2c5b1284b4a59581fb112a816d91904e88d218c refs/remotes/pkg/importer/ubuntu/pristine-tar