$ git clone -n https://src.fedoraproject.org/rpms/perl-Dist-Zilla-Plugin-Git.git /var/lib/mock/f45-build-23233-596/root/chroot_tmpdir/scmroot/perl-Dist-Zilla-Plugin-Git
Cloning into '/var/lib/mock/f45-build-23233-596/root/chroot_tmpdir/scmroot/perl-Dist-Zilla-Plugin-Git'...
$ git fetch origin ddee568796b8a8628177d1d4b917ec77ea4221c9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Dist-Zilla-Plugin-Git
 * [new ref]         ddee568796b8a8628177d1d4b917ec77ea4221c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ddee568 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild