$ git clone -n https://src.fedoraproject.org/rpms/libnetfilter_cttimeout.git /var/lib/mock/f45-build-16627-489/root/chroot_tmpdir/scmroot/libnetfilter_cttimeout
Cloning into '/var/lib/mock/f45-build-16627-489/root/chroot_tmpdir/scmroot/libnetfilter_cttimeout'...
$ git fetch origin f539aedff246644579308851dfa4a28b95c7d3ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnetfilter_cttimeout
 * [new ref]         f539aedff246644579308851dfa4a28b95c7d3ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f539aed Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild