$ git clone -n https://src.fedoraproject.org/rpms/perl-libnet.git /var/lib/mock/f45-build-27692-625/root/chroot_tmpdir/scmroot/perl-libnet
Cloning into '/var/lib/mock/f45-build-27692-625/root/chroot_tmpdir/scmroot/perl-libnet'...
$ git fetch origin cf7346b7c83924a81622869eb282ee48ecba4e30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-libnet
 * [new ref]         cf7346b7c83924a81622869eb282ee48ecba4e30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf7346b Perl 5.44 re-rebuild of bootstrapped packages