Add 1/4 teaspoon of the cinnamon, the allspice and nutmeg and cook, stirring, for 1 minute. Add the wine, cider and Calvados and cook until almost dry, about 5 minutes. Add the pumpkin puree, stock, ham hock, bouquet garni, cloves and salt and bring to a boil. Reduce the heat and simmer, partially covered, for 1 hour. Add the pepper. Discard the bouquet garni and cloves.