Starting with 4.0.3, we are merging the signed upstream tags as
upstream, instead of using the tarball that doesn’t ship tests.

# Example to import upstream 4.0.4 version
version=4.0.4
# We still use the upstream branch to drop the .gitattributes file from upstream
gbp import-ref --upstream-tag=%\(version%~%-\)s -u$version --debian-branch=upstream
gbp import-ref --upstream-tree=BRANCH -u$version
