$ git clone -n https://src.fedoraproject.org/rpms/jackson-annotations.git /var/lib/mock/f40-build-2432114-60651/root/chroot_tmpdir/scmroot/jackson-annotations
Cloning into '/var/lib/mock/f40-build-2432114-60651/root/chroot_tmpdir/scmroot/jackson-annotations'...
$ git fetch origin bd77ef5722cdc29257d6aaee2d9bbe82035b764c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jackson-annotations
 * [new ref]         bd77ef5722cdc29257d6aaee2d9bbe82035b764c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd77ef5 Conditionalize arches for RHEL