$ git clone -n https://src.fedoraproject.org/rpms/rust-drg.git /var/lib/mock/f40-build-2625079-65151/root/chroot_tmpdir/scmroot/rust-drg
Cloning into '/var/lib/mock/f40-build-2625079-65151/root/chroot_tmpdir/scmroot/rust-drg'...
$ git fetch origin 04ee80200ea9c6776cb51c2a9f58762c755a0e40:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-drg
 * [new ref]         04ee80200ea9c6776cb51c2a9f58762c755a0e40 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04ee802 Retired: Long term failure to build