[exim] Logging Spam Report In Rejectlog for Investigation

Using Spamassassin with Exim.
When an email is accepted and goes by the spam checking, the $spam_report variable is added to the X-Spam_report header.
However, if the spam is flat-out denied, information is logged in the rejectlog.  However, I'd like to be able to inspect these better.
Is there something that can be added to the ACL to also write the $spam_report to the rejectlog so I can see what rules were triggered in spamassassin to get to the score?
Thank you!
Brian S.