$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-Patricia.git /var/lib/mock/f45-build-25339-610/root/chroot_tmpdir/scmroot/perl-Net-Patricia
Cloning into '/var/lib/mock/f45-build-25339-610/root/chroot_tmpdir/scmroot/perl-Net-Patricia'...
$ git fetch origin 38ff7b95394d638e0d25ef2e39fab9e49d587ce4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-Patricia
 * [new ref]         38ff7b95394d638e0d25ef2e39fab9e49d587ce4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 38ff7b9 Perl 5.44 rebuild