I learned the song from Donovan's version years ago, but coming from my Yorkshire background, I have to make one tiny change to the lyric.
"Hey-up Santy Anna" could either be a friendly greeting or it could mean "Look out!" in many northern counties.
Either way the effect would be unintentionally comic.
So I sing "Hey, Look, Santy Anna, They're killing your soldiers below"
I recommend the idea to the house ( or the British part of it anyway)
Cheers
Dave