$ git clone -n https://src.fedoraproject.org/forks/msuchy/rpms/jorbis.git /var/lib/mock/f43-build-61067078-6588474/root/chroot_tmpdir/scmroot/jorbis
Cloning into '/var/lib/mock/f43-build-61067078-6588474/root/chroot_tmpdir/scmroot/jorbis'...
$ git fetch origin 243b381b193f03f0cdd2c791dcc8e968eab67e6f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/msuchy/rpms/jorbis
 * [new ref]         243b381b193f03f0cdd2c791dcc8e968eab67e6f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 243b381 Migrate to SPDX license