$ git clone -n https://src.fedoraproject.org/rpms/ghc-haskell-src-meta.git /var/lib/mock/f41-build-839712-160333/root/chroot_tmpdir/scmroot/ghc-haskell-src-meta
Cloning into '/var/lib/mock/f41-build-839712-160333/root/chroot_tmpdir/scmroot/ghc-haskell-src-meta'...
$ git fetch origin e897f6844d7b9a1e3d63f0956ac0c0803427a0c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-haskell-src-meta
 * [new ref]         e897f6844d7b9a1e3d63f0956ac0c0803427a0c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e897f68 https://hackage.haskell.org/package/haskell-src-meta-0.8.14/changelog