$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Toolbox.git /var/lib/mock/f45-build-26955-620/root/chroot_tmpdir/scmroot/perl-Test-Toolbox
Cloning into '/var/lib/mock/f45-build-26955-620/root/chroot_tmpdir/scmroot/perl-Test-Toolbox'...
$ git fetch origin 4d3689700acb4c91e74eb7d0328335827efd2671:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Toolbox
 * [new ref]         4d3689700acb4c91e74eb7d0328335827efd2671 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d36897 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild