In Star Wars Episode II: Attack of the Clones we are introduced to Jango Fett, a feared bounty hunter who is not only hired to kill Padme Amidala but is also the template for the Clone Army troopers, but how was he chosen? Jango himself says he was "recruited by a man called Tyranus" but doesn't say why or how.
It is mentioned in a Legends: Republic comic that he was chosen by a competition but is there any canon (pre-Disney or Disney, and non-Legends) version of the selection process?