You can run the following command on UNIX in a directory with your working copy:
svn log | grep -v '\--' | awk 'ORS=(NR%3)?" ":"\n"' | grep -v "[ISSUE_PREFIX]"
where [ISSUE_PREFIX] is your prefix for JIRA. For example, JPA for issues such as JPA-123.
It will have the following result:
r33 | user3 | 2011-12-21 16:29:29 +0200 (Wed, 21 Dec 2011) | 1 line Third commit log without JIRA key r22 | user2 | 2011-12-21 16:28:19 +0200 (Wed, 21 Dec 2011) | 1 line Second commit log without JIRA key r11 | user1 | 2011-12-21 16:27:18 +0200 (Wed, 21 Dec 2011) | 1 line First commit log without JIRA key
source share