$ git clone -n https://src.fedoraproject.org/rpms/ghc-split.git /var/lib/mock/f41-build-837791-159384/root/chroot_tmpdir/scmroot/ghc-split
Cloning into '/var/lib/mock/f41-build-837791-159384/root/chroot_tmpdir/scmroot/ghc-split'...
$ git fetch origin d8c423d07364e1b17663ce3418fe04d981383b17:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-split
 * [new ref]         d8c423d07364e1b17663ce3418fe04d981383b17 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d8c423d https://hackage.haskell.org/package/split-0.2.5/changelog