$ git clone -n https://src.fedoraproject.org/rpms/bzip3.git /var/lib/mock/f40-build-753227-117184/root/chroot_tmpdir/scmroot/bzip3
Cloning into '/var/lib/mock/f40-build-753227-117184/root/chroot_tmpdir/scmroot/bzip3'...
$ git fetch origin bfb477714ee703ba9aac627f49dcb121228ef6ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bzip3
 * [new ref]         bfb477714ee703ba9aac627f49dcb121228ef6ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bfb4777 1.3.2 bump