Mock same statement twice

I have a Java method with the following statement:

public void someMethod() {
  .....
  Long firstVal = someService.getSomeObject().getId();
  Long secondVal = someService.getSomeObject().getNextFunc().getOtherObject().getId();
  .....
}

Now I am trying to test this method and in mock setup I am trying to do like:

@RunWith(MockitoJUnitRunner.class)
public class SomeServiceTest {
  @Mock SomeService mockSomeService;
  SomeObject someObject = new SomeObject();

  @Before
  public void setup() {
    someObject.setId(123456);
    when(mockSomeService.getSomeObject).thenReturn(someObject);
    //...
  }
  //...
}

Now how can I mock for secondVal?