I've heard a number of versions of this, including one about "the Goddess on the mainline." Here's one version I found here (click). Chords are here (click). There's a nice recording on Voices of the Civil Rights Movement, from Smithsonian/Folkways.
-Joe Offer-

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JESUS ON THE MAINLINE . .
(Traditional)

Now, Jesus is on that mainline
Tell Him what you want
Jesus is on that mainline
Tell Him what you want
Jesus is on that mainline
Tell Him what you want
You can call Him up and tell Him what you want

Well, the line ain't never busy
Tell Him what you want
Wo, that line ain't never busy
Tell Him what you want
The line ain't never busy
Tell Him what you want
You can call Him up
And tell Him what you want

Now, if you're sick and wanna get well
Tell Him what you want
Oo, if you're sick and you wanna get well
Tell Him what you want
If you're sick and you wanna get well
Tell Him what you want
You can call Him up and tell Him what you want

Well, if you want your soul converted
Tell Him what you want
If you want your soul converted
Tell Him what you want
If you want your soul converted
Tell Him what you want
You can call Him up and tell Him what you want

Now, if your soul's in danger
Tell Him what you want
I f your soul's in danger
Tell Him what you want
If your soul's in danger
Tell Him what you want
You can call Him up and tell Him what you want

Tell Him what you want
Jesus is on that mainline
Tell Him what you want
Jesus is on that mainline
Tell Him what you want
Call Him up, call Him up, call Him up, call Him up
Call Him up and tell Him what you want^^^