$ git clone -n https://src.fedoraproject.org/rpms/perl-Filter-Simple.git /var/lib/mock/f43-perl-60945629-6586562/root/chroot_tmpdir/scmroot/perl-Filter-Simple
Cloning into '/var/lib/mock/f43-perl-60945629-6586562/root/chroot_tmpdir/scmroot/perl-Filter-Simple'...
$ git fetch origin bde8509ed44fa95b409592b94b89e127e8efc5a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Filter-Simple
 * [new ref]         bde8509ed44fa95b409592b94b89e127e8efc5a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bde8509 Increase release to favour standalone package