Check this out to learn the higher octave G Major scale in 2nd position. You'll also find several exercises and scale patterns to help increase strength, coordination, and familiarity in this position. Pay attention to the teaching tips listed with each exercise here.
Start with the Scale and memorize the fret hand fingering, that will be used for all the exercises. The Strength and Coordination exercise will help you build up those finger muscles. Arpeggios introduce you to chord tones and a new way of seeing, hearing and navigating a major scale. The 2 & 4 Note Scale Patterns will help you build a whole new level of dexterity in G major. They will have you prepared for almost any fiddle tune and some of the concepts can be used in your own improv solos.