Oracle Hung Transactions

I have the following PL/SQL program.

declare
v_amount NUMBER;
v_paymentno INTEGER := &sv_paymentno;
v_playerno INTEGER;
v_payment_date DATE:= SYSDATE;
begin
select 500 into v_amount from dual;
select 44 into v_playerno from dual;
insert into penalties values (v_paymentno, v_playerno, v_payment_date, v_amount);
end;

I forgot to add the commit statement and now I have hung transaction with dirty data with v_paymentno 27. Is there a way to commit or rollback that transaction?