$ git clone -n https://src.fedoraproject.org/rpms/mopac.git /var/lib/mock/f41-build-1022464-18076/root/chroot_tmpdir/scmroot/mopac
Cloning into '/var/lib/mock/f41-build-1022464-18076/root/chroot_tmpdir/scmroot/mopac'...
$ git fetch origin 220b4ec8d2a8d433c561253b643a4e68ceaa76da:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mopac
 * [new ref]         220b4ec8d2a8d433c561253b643a4e68ceaa76da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 220b4ec Eliminate use of obsolete %patchN syntax (#2283636)