One of the ordinances Jesus Christ orchestrated for the church was Baptism. Baptism by full immersion was first performed by John the Baptist on Jesus. In the record of this baptism in Matthew, we find: "13 Then Jesus came from Galilee to John at the Jordan to be baptized by him. 14 And John tried to prevent Him, saying, “I need to be baptized by You, and are You coming to me?” 15 But Jesus answered and said to him, “Permit it to be so now, for thus it is fitting for us to fulfill all righteousness.” Then he allowed Him. 16 When He had been baptized, Jesus came up immediately from the water; and behold, the heavens were opened to Him, and He saw the Spirit of God descending like a dove and alighting upon Him. 17 And suddenly a voice came from heaven, saying, “This is My beloved Son, in whom I am well pleased.” (Matt. 3:13-17, NKJV). Jesus was baptized by full immersion and thus replicated by the Church of God ordinances.
For further reading on Baptism, please check out the essay at the link below: