$ git clone -n https://src.fedoraproject.org/rpms/relval.git /var/lib/mock/f39-build-1591632-38294/root/chroot_tmpdir/scmroot/relval
Cloning into '/var/lib/mock/f39-build-1591632-38294/root/chroot_tmpdir/scmroot/relval'...
$ git fetch origin 4647b31f6acf36f47baf3c926918b6ff1b4a3c1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/relval
 * [new ref]         4647b31f6acf36f47baf3c926918b6ff1b4a3c1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4647b31 2.6.1: fix link text in testcase_stats detail pages