Redmine and SVN: How to link a Revision to an Issue AFTER the commit has happened?

One possible solution to make redmine re-read svn log of the project is to delete the repository from project settings, enter it again and go to repository tab, it will probably load everything from the beginning.

It's a workaround and perhaps there's a better way, but it should still work. Deleting repository from redmine project setting will not affect your actual svn repository.