$ git clone -n https://src.fedoraproject.org/rpms/jbigkit.git /var/lib/mock/f40-build-2241324-53661/root/chroot_tmpdir/scmroot/jbigkit
Cloning into '/var/lib/mock/f40-build-2241324-53661/root/chroot_tmpdir/scmroot/jbigkit'...
$ git fetch origin 7c9a49b282cade60441ff53c1328cafed8e1215c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jbigkit
 * [new ref]         7c9a49b282cade60441ff53c1328cafed8e1215c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c9a49b SPDX migration, spec update