$ git clone -n https://src.fedoraproject.org/rpms/sirius.git /var/lib/mock/f41-build-1041734-18988/root/chroot_tmpdir/scmroot/sirius
Cloning into '/var/lib/mock/f41-build-1041734-18988/root/chroot_tmpdir/scmroot/sirius'...
$ git fetch origin fb3960a1e313b3ca2a472c4ccf8137b01120a1b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sirius
 * [new ref]         fb3960a1e313b3ca2a472c4ccf8137b01120a1b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb3960a Eliminate use of obsolete %patchN syntax (#2283636)