$ git clone -n https://src.fedoraproject.org/rpms/kiwi-boxed-plugin.git /var/lib/mock/f40-build-2525438-61810/root/chroot_tmpdir/scmroot/kiwi-boxed-plugin
Cloning into '/var/lib/mock/f40-build-2525438-61810/root/chroot_tmpdir/scmroot/kiwi-boxed-plugin'...
$ git fetch origin 59992878e30e3be7938f251b77f08c2677c1fd64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kiwi-boxed-plugin
 * [new ref]         59992878e30e3be7938f251b77f08c2677c1fd64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5999287 Update to 0.2.32 (RH#2154862)