I have not seen an announcement of this, but I found a new* question and answer in the Red Hat Traning and Certification FAQ:
Certification candidates who are unsuccessful on their first individual exam attempt are now eligible for a free exam retake. The retake will appear in your scheduling application after your first exam results have been reported. To schedule the free retake, use the same process as scheduling an exam for the first time.
*The Wayback Machine shows that this question was not there on Jan 5th.