$ git clone -n https://src.fedoraproject.org/rpms/multilib-rpm-config.git /var/lib/mock/f40-build-2298868-56566/root/chroot_tmpdir/scmroot/multilib-rpm-config
Cloning into '/var/lib/mock/f40-build-2298868-56566/root/chroot_tmpdir/scmroot/multilib-rpm-config'...
$ git fetch origin e4229c8785b32d95cf638bfd39bb66c082f965a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/multilib-rpm-config
 * [new ref]         e4229c8785b32d95cf638bfd39bb66c082f965a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e4229c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild