minecraft-assets/assets/minecraft/models/block/pumpkin.json

{
    "parent": "block/cube_column",
    "display": {
        "firstperson_righthand": {
            "rotation": [ 0, 135, 0 ],
            "translation": [ 0, 0, 0 ],
            "scale": [ 0.40, 0.40, 0.40 ]
        }
    },
    "textures": {
        "end": "block/pumpkin_top",
        "side": "block/pumpkin_side"
    }
}