code: def load_job_from_ref(self):
          
          if not self.job_id:
              raise Exception('Job not loaded yet. Use load(id) first.')
  
          if not os.path.exists(self.git.work_tree + '/aetros/job.json'):
              raise Exception('Could not load aetros/job.json from git repository. Make sure you have created the job correctly.')
  
          with open(self.git.work_tree + '/aetros/job.json') as f:
              self.job = simplejson.loads(f.read(), object_pairs_hook=collections.OrderedDict)
  
          if not self.job:
              raise Exception('Could not parse aetros/job.json from git repository. Make sure you have created the job correctly.')
  
          self.logger.debug('job: ' + str(self.job))
docs: Loads the job.json into self.job