text: """Creates clean initial table reference_job."""
  
  import pandas as pd
  import logging
  import utils
  
  logging.basicConfig(
      level=logging.DEBUG,
      format=utils.logfmt,
      handlers=[logging.StreamHandler()],
  )
  logging.debug("started")
  engine = utils.sql_engine()
  response = engine.execute("truncate table reference_job")
  logging.debug(response)
  response = engine.execute("truncate table reference")
  logging.debug(response)
  stations = utils.load_stations()
  df_init = pd.DataFrame({
      'station': stations.index.get_level_values('station'),
      'dispatched_at': pd.NaT,
      'completed_at': pd.NaT,
  }).set_index('station')
  utils.insert_with_progress(df_init, engine, table_name='reference_job', chunksize=100)
  logging.debug("completed")
  