RigidbodyInterpolation.None  

rigidbody.interpolation = RigidbodyInterpolation.None;

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
void Awake() {
rigidbody.interpolation = RigidbodyInterpolation.None;
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

def Awake():
rigidbody.interpolation = RigidbodyInterpolation.None