This link shows how the CU/USC line has moved over the past week at various offshore books. In general it started around CU +4, moved to +5.5 as early money went on USC, and then came back down to +4.5 as money came back in on the Buffs.
http://www.covers.com/odds/linehistory.aspx?eventId=52504&sport=NCF
Here's how it changed from Sunday to Wednesday at one betting site in Caribbean (shown as USC laying pts)
Colorado vs. Southern California
BetOnline.ag Line Over/Under
10/02/16 4:38:25 PM -4/-110 (Open) OFF
10/02/16 5:28:25 PM -4/-115 OFF
10/02/16 6:48:25 PM -5.5/-115 OFF
10/02/16 6:58:35 PM -5.5/-110 OFF
10/02/16 10:28:27 PM -5/-110 OFF
10/03/16 8:38:27 AM -4.5/-110 OFF
10/03/16 10:58:26 AM -5/-115 OFF
10/03/16 3:38:27 PM -5/-115 58.5-110 (Open)
10/03/16 4:38:32 PM -5/-115 60-110
10/03/16 7:08:29 PM -5/-110 60-110
10/04/16 10:18:28 AM -5/-110 61-110
10/04/16 12:18:26 PM -5/-110 61.5-110
10/04/16 12:28:28 PM -5/-110 62.5-110
10/04/16 1:58:27 PM -5/-110 63.5-110
10/05/16 10:08:26 AM -4.5/-110 63.5-110