$ git clone -n https://src.fedoraproject.org/rpms/ghc-QuickCheck.git /var/lib/mock/f40-build-1998242-44222/root/chroot_tmpdir/scmroot/ghc-QuickCheck
Cloning into '/var/lib/mock/f40-build-1998242-44222/root/chroot_tmpdir/scmroot/ghc-QuickCheck'...
$ git fetch origin 33546531a272d7d2b311491deec03e4e3ade2379:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-QuickCheck
 * [new ref]         33546531a272d7d2b311491deec03e4e3ade2379 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3354653 https://hackage.haskell.org/package/QuickCheck-2.14.3/changelog