Preheat the oven to 350°F. Line a baking sheet with parchment paper and set aside.
In a small bowl, stir together the pumpkin puree, vanilla extract, and buttermilk. Set aside.
In a large mixing bowl, whisk together the flour, granulated sugar, cinnamon, ginger, cloves, allspice, baking powder, baking soda, and salt. Cut the butter into flour mixture using a pastry cutter or two forks until there are a some pea sized pieces.
Add the pumpkin puree mixture into the flour and mix together until just combined. The dough will be very sticky.
Sprinkle some flour onto a work surface and add the dough. Sprinkle some flour on the dough. Press into a 1-inch thick circle. Fold half of the dough towards the center. Fold the other half over the top of that. Press back into a 1-inch thick circle. Repeat these steps 2 more times, adding a sprinkle of flour as needed.
Form the dough into a flat circle. Cut the round in half and flatten into two discs. Cut each disc into 6 equal pieces and place on the prepared baking sheet.
Bake for 15-20 minutes, until slightly browned. While the scones are baking, in a small bowl mix together powdered sugar, cinnamon, ground cloves, and water. Once the scones are completely cooled, spoon on a teaspoon of icing to each scone.