Then Jesus called out in a loud voice, “Father, into Your hands I commit My Spirit.” And when He had said this, He breathed His last.(Luke23:46)

The Catholic Church teaches the Jesus Christ was True God and True Man and was given like the rest of mankind a "rational soul and human will".

This can be seen in the Agony in the Garden when Jesus said in Luke gospel,

“Father, if You are willing, take this cup from Me. Yet not My will, but Yours be done.”(Luke22:42)

My simple question is from Catholic teaching and biblical explanation what is the spirit that Jesus commended?

Is it his human soul or the Spirit of Christ?