$ git clone -n https://src.fedoraproject.org/rpms/oscillatord.git /var/lib/mock/f40-build-803364-144249/root/chroot_tmpdir/scmroot/oscillatord
Cloning into '/var/lib/mock/f40-build-803364-144249/root/chroot_tmpdir/scmroot/oscillatord'...
$ git fetch origin 63bf96d247cfc88112a965fee1dd901a199c044d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oscillatord
 * [new ref]         63bf96d247cfc88112a965fee1dd901a199c044d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63bf96d Update to 3.6.3