6:17 - Hard Case (after the ground shakes): "What the?" In Attack of the Clones, an alien on Coruscant makes this same exclamation as he sees Obi-Wan flying through traffic while hanging from a droid [15:08]; Han Solo says it in A New Hope after emerging from hyperspace into a meteor shower [1:03:15], and in Return of the Jedi, a scout trooper says this after being hit by Wicket [1:05:38].
6:33 - Fives (to Hard Case, referring to the Umbaran tank): "Blast it!" Probably just coincidentally, Luke also yells this to Han in A New Hope (referring to the dianoga in the trash compactor): "Blast it, will you!?" [1:20:38]. He also uses this expression simply to express frustration: "Blast it!" after R2-D2 disappears [26:49] and "Blast it, Biggs, where are you?" when a TIE fighter is behind him during the Battle of Yavin [1:49:09]. This is also how Obi-Wan uses it in Attack of the Clones, when Jango Fett ambushes him: "Blast! This is why I hate flying!" [1:08:22].
8:26 - Fives: "We're safe for the moment." This line is similar to some dialogue in A New Hope. Luke asks C-3PO, "Are you safe?" and he replies, "For the moment" [1:26:02].
15:58 - Hard Case: "I prefer a good fight to all this sneakin' around." Han Solo says almost the same thing in A New Hope: "I prefer a straight fight to all this sneakin' around" [1:09:01].
20:22 - General Krell (after the clones have defeated the Umbaran tanks): "Impressive." Vader gives a similar compliment to Luke in The Empire Strikes Back: "Impressive, most impressive" [1:44:30].
21:28 - Rex: "A lot of men died to take this base." Perhaps coincidentally, this is very similar to Mon Mothma's line "Many Bothans died to bring us this information" in Return of the Jedi [49:36].