To demonstrate how the major scale pattern works starting on any note, here is the G major scale. Notice that the 7th degree is F sharp (F#) instead of F. This is done to maintain the correct pattern of tones and semitones and thus retain the sound of the major scale (do re mi fa so la ti do).
Here is the notation for the G major scale. The F # note is the same as the one you learned to play earlier in The Ash Grove (hole 6 inhaled with the slide pushed in).