in windows-builder/builder/builder/gce.go [243:251]
func (s *Server) refreshInstance(bs *BuilderServer) error {
inst, err := s.service.Instances.Get(s.projectID, *bs.Zone, s.instance.Name).Do()
if err != nil {
log.Printf("Could not refresh instance: %v", err)
return err
}
s.instance = inst
return nil
}