If you want to print all the columns in your select clause you can go with the autoprint command.
CREATE OR REPLACE PROCEDURE sps_detail_dtest(v_refcur OUT sys_refcursor)
AS
BEGIN
OPEN v_refcur FOR 'select * from dummy_table';
END;
SET autoprint on;
--calling the procedure
VAR vcur refcursor;
DECLARE
BEGIN
sps_detail_dtest(vrefcur=>:vcur);
END;
Hope this gives you an alternate solution