$ git clone -n https://src.fedoraproject.org/rpms/vdr-streamdev.git /var/lib/mock/f41-build-side-1-2778965-32451/root/chroot_tmpdir/scmroot/vdr-streamdev
Cloning into '/var/lib/mock/f41-build-side-1-2778965-32451/root/chroot_tmpdir/scmroot/vdr-streamdev'...
$ git fetch origin 7071ef83c9d8b8428ac7e62e02ad0e2fcd01f77a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-streamdev
 * [new ref]         7071ef83c9d8b8428ac7e62e02ad0e2fcd01f77a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7071ef8 convert license to SPDX