Country Song Upside Down Wilco

I found a song
Upside-down
A country song
Like a trout
Dying sky and water
Rainbow
Flickering out

Inside a dark cabin
The more moonlike I become
Rounding all of my edges
'Cause I'm worried
It can't be sung

This is the gist
It goes
Like this

I found a song
Upside-down
A country song
Without a doubt
Dying sky and water
Rainbow
Flickering out