Starting with 1.0.15, we are merging the upstream tags as
upstream, instead of using the tarball that doesn’t ship tests.

# Example to import upstream 1.0.17 version
version=1.0.17
# We still use the upstream branch to drop the .gitattributes file from upstream
gbp import-ref --upstream-tag=%\(version%~%-\)s -u$version --debian-branch=upstream-v1
gbp import-ref --upstream-tree=BRANCH -u$version
