$ git clone -n https://src.fedoraproject.org/rpms/gnuradio.git /var/lib/mock/f39-build-2265446-54585/root/chroot_tmpdir/scmroot/gnuradio
Cloning into '/var/lib/mock/f39-build-2265446-54585/root/chroot_tmpdir/scmroot/gnuradio'...
$ git fetch origin 67d606ad76b393207c55fff9e92266402d5f2ee6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnuradio
 * [new ref]         67d606ad76b393207c55fff9e92266402d5f2ee6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 67d606a Rebuild for codec2.