Looking at the commit logs we very often reference the corresponding jira issue, e.g.: "SLING-1889 : Make job creation date available"
Now if we made use of the bugtraq subversion properties (http://www.syntevo.com/smartsvn/documentation.html?page=commands.bugtraq-properties) we could directly link into JIRA. Clients such as subversive support this feature. When the feature is enabled and you look at the revision history of a source file (in subversive, or tortoise, or ...), the SLING-XXXX words will show up as links. If you press on the link/word the browser shows the corresponding jira page. bugtraq:url -> https://issues.apache.org/jira/browse/%BUGID% bugtraq:logregex -> SLING\-\d{4,} WDYT? I could apply these properties to our repo if you wish...