$ git clone -n https://src.fedoraproject.org/rpms/fossil.git /var/lib/mock/f40-build-1183206-21996/root/chroot_tmpdir/scmroot/fossil
Cloning into '/var/lib/mock/f40-build-1183206-21996/root/chroot_tmpdir/scmroot/fossil'...
$ git fetch origin 7be950639a08685882d1078322c96f4d661f25f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fossil
 * [new ref]         7be950639a08685882d1078322c96f4d661f25f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7be9506 Fix tests