To a large stockpot over medium heat, add bacon, rendered fat, onion, and ham hock. Sauté until onions are translucent, about 5 to 6 minutes. Add 6 cups water and remaining ingredients except greens, and whisk together. Add greens and partially cover pot with lid. Cook until tender, stirring occasionally, about 45 minutes to 1 hour. If necessary, add up to 4 more cups of water as you go and taste for seasoning. (The longer you cook the greens, the more flavor they will have.)
