Gather 3rd ed. has this song in their section for Lent by their favourite priest song-writer Francis Patrick O’Brien.
The verses are in G, the refrain is in E and there are some interesting chords. In places the tune of the verse sounds like passages from “Calling Occupants of Interplanetary Craft”. The text works fine for Lent.
GIA will sell you the sheet music and the text is here.