$ git clone -n https://src.fedoraproject.org/rpms/ghc-indexed-traversable.git /var/lib/mock/f40-build-2055414-49118/root/chroot_tmpdir/scmroot/ghc-indexed-traversable
Cloning into '/var/lib/mock/f40-build-2055414-49118/root/chroot_tmpdir/scmroot/ghc-indexed-traversable'...
$ git fetch origin e6f3f5bdd7f6a535b87370e41cc8dedc9e579535:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-indexed-traversable
 * [new ref]         e6f3f5bdd7f6a535b87370e41cc8dedc9e579535 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6f3f5b https://hackage.haskell.org/package/indexed-traversable-0.1.2.1/changelog