$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-DNS-SEC.git /var/lib/mock/f45-build-25245-610/root/chroot_tmpdir/scmroot/perl-Net-DNS-SEC
Cloning into '/var/lib/mock/f45-build-25245-610/root/chroot_tmpdir/scmroot/perl-Net-DNS-SEC'...
$ git fetch origin ef414c68bf79d3843bf0f37c73dce93feeefa859:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-DNS-SEC
 * [new ref]         ef414c68bf79d3843bf0f37c73dce93feeefa859 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef414c6 Perl 5.44 rebuild