οὐ γὰρ ἂν τό γε πραχθὲν ἀγένητον θείη → since he cannot make what was done as though it had not come to pass
See Cleitus.
Clītus: i, m., = Κλεῖτος,
I a friend of Alexander the Great, who was killed by him in a fit of drunkenness, Cic. Tusc. 4, 37, 79; Curt. 8, 1, 9 al.