$ git clone -n https://src.fedoraproject.org/rpms/vdr-skinelchihd.git /var/lib/mock/f41-build-side-1-2778961-32451/root/chroot_tmpdir/scmroot/vdr-skinelchihd
Cloning into '/var/lib/mock/f41-build-side-1-2778961-32451/root/chroot_tmpdir/scmroot/vdr-skinelchihd'...
$ git fetch origin b0574a8db78e8f779198cc6c92d4e72740934534:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-skinelchihd
 * [new ref]         b0574a8db78e8f779198cc6c92d4e72740934534 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0574a8 convert GPLv2+ license to SPDX