$ git clone -n https://src.fedoraproject.org/rpms/oscillatord.git /var/lib/mock/f41-build-843781-162105/root/chroot_tmpdir/scmroot/oscillatord
Cloning into '/var/lib/mock/f41-build-843781-162105/root/chroot_tmpdir/scmroot/oscillatord'...
$ git fetch origin c10e678cc91b129667093d94966ccffb2ff1831a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oscillatord
 * [new ref]         c10e678cc91b129667093d94966ccffb2ff1831a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c10e678 Update to 3.8.0