I found this over on XDA under Moto G Android Devlopment. The author made a small change to the Moto G Logo.bin file using a hex editor which causes an unlocked device to display the normal logo on the Moto G.
The author's description of what he did to the logo.bin file:
As always, the standard disclaimer applies - I am not responsible for anything that may happen to your device - good or bad.
Enjoy
The author's description of what he did to the logo.bin file:
I compared the files side-by-side myself in a hex editor and thought it was worth attempting to flash. The result was that the warning was replaced with a momentary display of the image below before going through the animated logo sequence:Via hex edit, man! I discovered that on header of file there's a mapping of boot type -> offset of image. =P So I changed offset of logo_unlocked to be the same as logo_boot.

As always, the standard disclaimer applies - I am not responsible for anything that may happen to your device - good or bad.
Enjoy