$ git clone -n https://src.fedoraproject.org/rpms/ghc-graphviz.git /var/lib/mock/f41-build-839650-160289/root/chroot_tmpdir/scmroot/ghc-graphviz
Cloning into '/var/lib/mock/f41-build-839650-160289/root/chroot_tmpdir/scmroot/ghc-graphviz'...
$ git fetch origin 11e82eb1c03b2a1ab35c2057ed4d30f1bb9f80a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-graphviz
 * [new ref]         11e82eb1c03b2a1ab35c2057ed4d30f1bb9f80a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 11e82eb https://hackage.haskell.org/package/graphviz-2999.20.2.0/changelog