$ git clone -n https://src.fedoraproject.org/rpms/toolbox.git /var/lib/mock/f40-build-2102480-50549/root/chroot_tmpdir/scmroot/toolbox
Cloning into '/var/lib/mock/f40-build-2102480-50549/root/chroot_tmpdir/scmroot/toolbox'...
$ git fetch origin 57ae69592c86bef5f8493cc68a04fb8a905f5719:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/toolbox
 * [new ref]         57ae69592c86bef5f8493cc68a04fb8a905f5719 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57ae695 Drop the experience and support subpackages