Webster, 25, won his last start with the Aces on Aug. 1 @ El Paso, allowing 3 runs with 8 strikeouts in 6.1 innings. In 11 starts with Reno this season, he is 3-5 with an 8.95 ERA (55 ER in 55.1 IP). Webster made 4 starts with the D-backs in June, including earning the victory in his D-backs debut on June 13 @ Giants (2 ER in 5.2 IP). Hodley, 25, was 3-0 with a 1.50 ERA (3 ER in 18.0 IP) in 3 starts with the D-backs this season. He won his last start on Aug. 3 @ Nationals (0 ER in 6.0 IP), becoming the second Arizona starter to win his first 3 Major League outings (also Chase Anderson in 2014).
It's not entirely unexpected, with the team also announcing that Chase Anderson will come back to the rotation during the upcoming series against the Reds, either on Friday or Saturday. Webster's return is presumably a short-term one to bolster the bullpen, especially after they (Josh Collmenter, in particular) had to work an extended game yesterday, following Patrick Corbin's swift departure. Webster seems like a bit of an odd choice, particularly because his Reno performances have been just terrible. Over his last three games he has allowed 19 earned runs in 13.2 innings, with a line against of .448/.472/.687. albeit with a BABIP of .519. I presume mop-up duty only.
As for Godley, the team is simply being conservative with his innings pitched. He was a reliever last season, and only threw 55 innings; he's already close to double that this year. He may well go back largely to relief work the rest of the season, but there's no reason to think the team was other than extremely happy with the work produced in his first major-league stint, and he'll likely be one of the (many) names in the mix for a rotation spot, when spring training rolls around again next year.