Steve may be correct about Bow Wow Wow being a blind alley, but several American song sheets have verses that use a tune by that name.
I can't find the original song, but one of those using the tune Bow-Wow-Wow is That's What's the Matter No. 3, c. 1860s, as sung by the popular entertainer, Tony Pastor.

The chorus includes the nonsense line "That's just so; ri fol too ral too- that's just so."

The first part of Dixie's Land is questionably traced to "an 18th c. English song called "Bow Wow Wow""