Standard formula for expository writing:

You tell them what you are going to tell them.

You tell them.

Then you tell them what you've just told them.

I don't gratuitously repeat the first verse at the end--unless that is the way it is presented by my source for the song, such as in a Cecil Sharp collection or in a text from Child. Or if this is the way it is sung by someone I learned it from, such as on a record by someone notable for their authentic and tasteful presentations.

And if it doesn't "clank."

Don Firth