According to a tweet from the usually reliable leakster @LlabTooFeR. Google seems to have presumably started the rollout of Android 6.0.1 Marshmallow for its Android One range of smartphones.
Early reports indicate that Android 6.0.1 does not really bring anything new. The update probably only contains some bug fixes and stability improvements.
According to AndroidBeat, Cherry Mobile G1 smartphone in the Philippines is among the first Android One devices to receive the Android 6.0.1 update.