class EditPedido(View):
def get(self, request, venda):
    data = {}
    venda = fixa.objects.get(id=venda)
    data['filial'] = venda.regional
    return render(request, 'fixa/fixa_update.html', data)

<select name="filial" class="select form-control" required="" id="filial">
       <option value="" selected="">---------</option>
         {% for filial in filiais %}
       <option value="{{ filial.id }}">{{ filial.nome }}</option>
         {% endfor %}
</select>