$ git clone -n https://src.fedoraproject.org/rpms/cjs.git /var/lib/mock/f41-build-side-1-2633071-25885/root/chroot_tmpdir/scmroot/cjs
Cloning into '/var/lib/mock/f41-build-side-1-2633071-25885/root/chroot_tmpdir/scmroot/cjs'...
$ git fetch origin 3613a601e5bc6ae0eb5d4a9e2e2f1d6dc47fd578:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cjs
 * [new ref]         3613a601e5bc6ae0eb5d4a9e2e2f1d6dc47fd578 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3613a60 convert license to SPDX