Preheat oven to 350°F (175°C) and grease a 9x13 inch baking pan or two 9-inch round cake pans.
In a large mixing bowl, sift together the flour, sugar, cocoa powder, baking soda, baking powder, and salt.
Add the eggs, buttermilk, vegetable oil, and vanilla extract to the dry ingredients. Beat on medium speed for approximately 2 minutes until well combined.
Stir in the hot coffee by hand using a spatula; the batter will be thin in consistency.
Gently fold in the cherry pie filling until evenly distributed.
Pour the batter into the prepared baking pan.
Bake for 35 to 40 minutes, or until a cake tester inserted into the center comes out clean.
Transfer to a wire rack and allow the cake to cool completely before slicing or applying frosting.