Scenario: we're using Upsource both as a code review tool and as a repository browser. Yet it's not listed as a supported repo browser, and we cannot make Jenkins point to specific revisions even knowing their numbers and the url syntax.

It would be nice to allow constructing urls pointing to a specific revision - using meta-elements like $baseurl, $hostname, $projectname/$reponame, $revisionnumber ; maybe also credentials - or whatever other needed stuff. 

Thus, my Upsource url could be constructed from bricks like:
https://$hostname:9443/$reponame/revision/$branchname-$revisionnumber
or 
$baseurl/$reponame/revision/$branchname-$revisionnumber
or just putting everything but the revisionnumber explicitly:
https://my.ho.st.na.me:9443/myrepo/revision/mybranch-$revisionnumber

That could be easily tuned to match probably any repobrowser, and avoid the "jenkins does not support my favorite repobrowser flavor" complaints.