$ git clone -n https://src.fedoraproject.org/rpms/ghc-lens.git /var/lib/mock/f39-build-2028636-47343/root/chroot_tmpdir/scmroot/ghc-lens
Cloning into '/var/lib/mock/f39-build-2028636-47343/root/chroot_tmpdir/scmroot/ghc-lens'...
$ git fetch origin 980a134290168b73535b1a83267fdb77ed45717c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-lens
 * [new ref]         980a134290168b73535b1a83267fdb77ed45717c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 980a134 https://hackage.haskell.org/package/lens-5.2.2/changelog