If you really must make the link in your rss items not the url of your item (you shouldnt), at least make the guid your permalink
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
If you really must make the link in your rss items not the url of your item (you shouldnt), at least make the guid your permalink