$ git clone -n https://src.fedoraproject.org/rpms/perl-Dist-Zilla-Config-Slicer.git /var/lib/mock/f45-build-23211-596/root/chroot_tmpdir/scmroot/perl-Dist-Zilla-Config-Slicer
Cloning into '/var/lib/mock/f45-build-23211-596/root/chroot_tmpdir/scmroot/perl-Dist-Zilla-Config-Slicer'...
$ git fetch origin c47703e6cae165afe62f04255f74a2f494fb75cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Dist-Zilla-Config-Slicer
 * [new ref]         c47703e6cae165afe62f04255f74a2f494fb75cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c47703e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild