Green’s Dictionary of Slang

jag v.5

[? jack v.3 (1), but note blag v. (2)]

(Aus.) to obtain, to get hold of .

[Aus]N. Cummins Adventures of the Honey Badger [ebook] After jagging a role as tourist ambassador for West Oz, a friend in the department [...] organised a cracker of a trip for me to realise a dream.