Measure carefully, placing water, sour cream, egg, flour, granulated sugar, salt and yeast in bread machine pan in the order recommended by the manufacturer. Select Dough/Manual cycle. Do not use delay cycles.
Remove dough from pan, using lightly floured hands. Cover and let rest 10 minutes on lightly floured surface.
Grease large cookie sheet with shortening. Divide dough into thirds. Roll each third into 26-inch rope; place ropes side by side. Starting at middle, braid one end together gently and loosely; repeat with other end. Pinch ends to fasten. Shape braid into circle on cookie sheet; pinch ends together. (Wreath can be covered with plastic wrap and refrigerated up to 48 hours. Before baking, remove the wreath from the refrigerator and remove plastic wrap. Cover with a kitchen towel and let rise in a warm place about 2 hours or until double.) Cover and let rise in warm place 45 to 50 minutes or until double. (Dough is ready if indentation remains when touched.)
Heat oven to 350º. Brush beaten egg over dough. Mix sugar crystals, cinnamon, cloves and nutmeg; sprinkle over dough. Bake 25 to 30 minutes or until golden brown.