$ git clone -n https://src.fedoraproject.org/rpms/zinnia.git /var/lib/mock/f40-build-733712-105363/root/chroot_tmpdir/scmroot/zinnia
Cloning into '/var/lib/mock/f40-build-733712-105363/root/chroot_tmpdir/scmroot/zinnia'...
$ git fetch origin 5a5a4a0924804c192d440b62686d2fac3af98d03:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zinnia
 * [new ref]         5a5a4a0924804c192d440b62686d2fac3af98d03 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a5a4a0 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild