Is there a way I can tell Nhibernate to ignore any future changes on a set of objects retrieved using it?

public ReturnedObject DoIt()
{
    List<MySuperDuperObject> awesomes = repository.GetMyAwesomenesObjects();
    var sp = new SuperParent();
    BusinessObjectWithoutNHibernateAccess.ProcessThese(i, awesomes,sp)
    repository.save(sp);
    return i;
}

public ReturnedObject FakeIt()
{
    List<MySuperDuperObject> awesomes = repository.GetMyAwesomenesObjects();
    var sp = new SuperParent();
    // should something go here to tell NHibernate to ignore changes to awesomes and sp?
    return BusinessObjectWithoutNHibernateAccess.ProcessThese(awesomes,sp)
}