$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-ARP.git /var/lib/mock/f41-build-815989-149916/root/chroot_tmpdir/scmroot/perl-Net-ARP
Cloning into '/var/lib/mock/f41-build-815989-149916/root/chroot_tmpdir/scmroot/perl-Net-ARP'...
$ git fetch origin 78e919d25043dc6c27a75f787da267c4943dbbfb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-ARP
 * [new ref]         78e919d25043dc6c27a75f787da267c4943dbbfb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78e919d Perl 5.40 rebuild