Hi, Leeneia -
You just ain't Googling right. try this (click)
This page (click) has a complex MIDI, and this one has one that's nice. This page has the song and all sorts of other stuff you'll like. This page has a gif of the sheet music. I'll post lyrics and a MIDI in a moment or three.
-Joe Offer-

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Hey Ho, To the Greenwood!
(William Byrd, 1543-1623)

1. Hey ho, to the greenwood now
   
2. let us go. Sing heave and ho, And
   
3. there shall we find both buck and doe. Sing heave
   
4. and ho. The hart and hind and the little pret-
   
5. ty rowe. Sing heave and ho.

The above is from Sol Weber's Rounds Galore!, and it's the confusingest round I've ever seen. It's in five lines of three measures each, with lyrics divided as above. The GIF I linked to above looks a lot more possible:

¹Hey ho, ²to the greenwood now ³let us go.
Sing heave and ho,
And there shall we find both buck and doe.
Sing heave and ho.
The hart and hind and the little pretty rowe.
Sing heave and ho.

Tune is the same, either way.

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Click to play

I don't think I will be adding this to my repertoire any time soon.