$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-ARP.git /var/lib/mock/f45-build-25212-610/root/chroot_tmpdir/scmroot/perl-Net-ARP
Cloning into '/var/lib/mock/f45-build-25212-610/root/chroot_tmpdir/scmroot/perl-Net-ARP'...
$ git fetch origin 34327e7f1e26dbf40c1648bdb4c95d2666e84f65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-ARP
 * [new ref]         34327e7f1e26dbf40c1648bdb4c95d2666e84f65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 34327e7 Perl 5.44 rebuild