I've just listened to the Dallas String Band's fantastic original of this, as downloaded from the Juneberry 78 site and what I hear is this

Someday you'll find the end of my rainbow,
And maybe find a little pot of gold.
Someday while running around,
You'll find what we never found.
That golden mist,
The rainbow kissed,
That all falls down in a little pot of gold.
Someday silver clouds will be missing,
Angels cover up my gold.
There ain't nothing I can do,
While that I am feeling blue,
But chase the rainbows in my soul.

There is only one verse - it is sung twice with an instrumental break in between