fixup!

git-fixup!.fish

function git-fixup! -a ref
    if not git log --format="%H" -20 | grep -q $ref
	      # In theory we could rebase back to ANY commit.
	      # But I'm probably not going to want to unless it's a recent commit.
	      printf "Could not find $ref in the last 20 commits\n"
	      return 1
    end

    git commit --fixup=$ref
    git rebase --interactive --autosquash "$ref~1"
end