The song now has a Wikipedia page:

https://en.wikipedia.org/wiki/When_a_Knight_Won_His_Spurs

The Wikipedia lyrics seem a little more polished than the ones I posted above.

WHEN A KNIGHT WON HIS SPURS
(lyrics by Jan Struther, melody: STOWEY)

When a knight won his spurs, in the stories of old,
He was gentle and brave, he was gallant and bold
With a shield on his arm and a lance in his hand,
For God and for valour he rode through the land.

No charger have I, and no sword by my side,
Yet still to adventure and battle I ride,
Though back into storyland giants have fled,
And the knights are no more and the dragons are dead.

Let faith be my shield and let joy be my steed
'Gainst the dragons of anger, the ogres of greed;
And let me set free with the sword of my youth,
From the castle of darkness, the power of the truth.