$ git clone -n https://src.fedoraproject.org/rpms/jackson-bom.git /var/lib/mock/f40-build-2241150-53661/root/chroot_tmpdir/scmroot/jackson-bom
Cloning into '/var/lib/mock/f40-build-2241150-53661/root/chroot_tmpdir/scmroot/jackson-bom'...
$ git fetch origin eb259a4b4da24ee718096bbeebbd65c0fe62810b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jackson-bom
 * [new ref]         eb259a4b4da24ee718096bbeebbd65c0fe62810b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb259a4 [packit] 2.16.0 upstream release