Additional parameters to post-commit hook or what hook should I be using?

I have the post-commit hook working but there are only 2 parameters passed
into the hook, $REPOS and $REV.

I have previously played around with SVN hosted by
https://opensvn.csie.org/ and they are sending out notifications that look
like the text at the bottom of this message.

I tried to understand if any of the other hooks would provide the
information similar to the message below but either I did not understand
when the hook gets fired or it didn't look like it had the necessary
parameters.

I am mostly looking for the ability for the message to include the files
that were committed.

Thanks
Steve

*steve Thu Feb 23 07:43:56 2006 UTC

 Repository:
   https://OpenSVN.csie.org/MyRepository

 Revision: 6

 Log:

 Flag Changes Path
 U +2 -2 Business/hbm_xml/contract_item.hbm.xml
 U +2 -2 Business/hbm_xml/employee.hbm.xml
 U +1 -1 Business/hbm_xml/payment.hbm.xml
 U +9 -0 Business/poco/Employee.cs

 Trac view:
   https://OpenSVN.csie.org/traccgi/MyRepository/trac.cgi/changeset/6*
Received on Tue Feb 28 04:56:05 2006