We are merging the sigupstream tags as upstream,
instead of using the tarball that doesn’t ship tests.

# Example to import upstream 2.4.1 version
version=2.4.1
# We still use the upstream branch to drop the .gitattributes file from upstream
gbp import-ref --upstream-tag=v%\(version%~%-\)s -u$version --debian-branch=upstream-lts
gbp import-ref --upstream-tree=BRANCH -u2.11.1+$version
