“The Cherry-Tree Carol” is Child Ballad number 54. The number comes from Francis James Child’s influential collection English and Scottish Popular Ballads, where the song is classified among the traditional ballads of Britain.
The carol tells an apocryphal Nativity story. Mary asks Joseph to pick cherries while they travel toward Bethlehem; after he responds harshly, the unborn Jesus commands the tree to lower a branch. Joseph then recognizes the miracle and repents. Some versions continue with prophecies of Christ’s death and resurrection.
The song is also Roud Folk Song Index number 453, a separate cataloging system. That is the likeliest source of confusion in this question: 54 is the Child Ballad number, while 453 is the Roud number.
Its story may preserve elements related to the apocryphal Gospel of Pseudo-Matthew, although that source places a similar episode during the Flight into Egypt and uses a palm tree rather than a cherry tree. The carol appears in material connected with the fifteenth-century N-Town Plays and survives in many folk versions.