Even though I'm pretty sure it's a no, I might as well get some opinions... SO
Special: The Martial Focus feat counts as the weapon training class feature with the chosen fighter weapon group for the purpose of weapon mastery feat prerequisites and what weapons you can use with weapon mastery feats.
Special: This feat can be taken more than once, but at most once per 5 fighter levels.
Let's say you're Magus. You've hit level 7 and acquired a BaB of 5+ and you now qualify for Martial Focus. At level 8 your Fighter Training now counts you as a 5th level fighter for feats. You now have meet the prerequisite for the Advanced Weapon Training feat... but can you benefit from it since you haven't technically selected a weapon group WITH Weapon Training?
Now the Martial Focus feat requires you to pick a weapon group from Fighter and that same feat allows you count as have the Weapon Training feature... is that enough to apply AWT to the group selected?