Motorola is now pushing out an update to the Motorola Update Services app on Google Play to the first generation Moto G smartphone. With the updated Motorola Update Services, users of the 2013 Moto G will be ready for when Motorola pushes out Android 5.0 Lollipop and the company advises all users to "accept this update" on their compatible devices.
The change log is sparse, but here's what is shown on Google Play:
This update is necessary to enable a future upgrade of your device to Android 5.0, Lollipop. It updates the installer on: Moto G (1st Gen.)