$ git clone -n https://src.fedoraproject.org/rpms/kiwi-boxed-plugin.git /var/lib/mock/f41-build-side-1-2751467-31104/root/chroot_tmpdir/scmroot/kiwi-boxed-plugin
Cloning into '/var/lib/mock/f41-build-side-1-2751467-31104/root/chroot_tmpdir/scmroot/kiwi-boxed-plugin'...
$ git fetch origin 5f2fce94c3d55f0116ed4594c541ccb65bda443b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kiwi-boxed-plugin
 * [new ref]         5f2fce94c3d55f0116ed4594c541ccb65bda443b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f2fce9 Update to 0.2.38