How did you get that job?

Hebrews 5:5

In the same way, Christ did not take on himself the glory of becoming a high priest. But God said to him, “You are my Son; today I have become your Father..

Jesus is careering headlong into Jerusalem for the last time. Perhaps he knows of the triumphal entry on Sunday, perhaps not. Does he know he will scourge out of the Temple those who abuse God’s house? Possibly not. Does he know a woman will anoint his feet with oil? Again, possibly not.
Does he know that one of those who have followed him for three years and will share the Passover meal with him on Thursday will betray him? Very likely, for he knew he would not survive the week and that someone would have to sell him out. He did not, though, try to change things, for this is what he was called to do; to show God’s love for the world and his own love both to God and to us.
It has often been discussed how much did Jesus know about his Divinity? One argument being if he knew in advance of Thursday that no matter what happened on Friday he would be fine by Sunday, it took away any sacrifice from those events. This was one week when he had to be fully human so we could understand his sacrificial love for us all.
It was God the father who made him High Priest, it is we who reap the benefits of that Priesthood

Lord God our loving Father in Heaven, you sent your son to be our High Priest.  He came and served us even though it was his doom, and in your mercy you raised him again from the dead that he might be alive for us through all eternity. Lord we need you with us now as much as Jesus did that week.  Hear us as we call to you for help, for courage, for wisdom, for faith, and for hope, that we might face our Easter week knowing that you are here and will be forever more.
In your Mercy hear our prayer.