Como posso buscar a partir de um cursor ref retornado de um procedimento armazenado (variável OUT) e imprimir as linhas resultantes em STDOUT no SQL * PLU

rocedimento armazenado @ORACLE:

PROCEDURE GetGrantListByPI(p_firstname IN VARCHAR2, p_lastname IN VARCHAR2,
p_orderby IN VARCHAR2, p_cursor OUT grantcur);

PL / SQL:

SET SERVEROUTPUT ON;

DECLARE
  TYPE r_cursor IS REF CURSOR;
  refCursor r_cursor;

  CURSOR grantCursor IS
    SELECT last_name, first_name
    FROM ten_year_pis
    WHERE year_added = 2010;

  last_name VARCHAR2(100);
  first_name VARCHAR2(100);

BEGIN
  OPEN grantCursor;
  FETCH grantCursor INTO last_name, first_name;

  WHILE grantCursor%FOUND LOOP
    PMAWEB_PKG.GetGrantListByPI(last_name, first_name, 'last_name', refCursor);

    --HOW DO I LOOP THROUGH THE RETURNED REF CURSOR (refCursor)
    --AND PRINT THE RESULTING ROWS TO STDOUT?

    FETCH grantCursor into last_name, first_name;
  END LOOP;
  CLOSE grantCursor;
END;
/