If He is a homing pigeon, they are used to being handled so he will not peck you should you attempt to pick him up either come from the bottom as if to offer your hand for him to step up on you hand or wrap your hand around his back with his wings closed, then you can read his tag, here is a link that I attached to contact to recover lost homers, if he is sitting on your fence all this time, he must live by or is completely off track and is lost.
http://www.interbug.com/pigeon/lost.html