The group then went to the city centre’s Argyle Street where Wason, now 19, of Barrhead, East Renfrewshire, joined them.
Members of the public – who were reported to be “frightened and scared” – were forced to take refuge in nearby shops while police officers drew batons at the Celtic fans.
Prosecutor Kyle Dalziel said: “Around 12.30pm, both fans advanced towards each other and were separated by less than 500 metres.
“Both came together, challenging each other to fight and mass disorder took place.”
The court heard how vehicles were unable to move as the disturbance broke out on the roads.
But police officers were able to control the situation and put a cordon in place.
Rangers fans were then put on a train from Glasgow Central to Mount Florida, while the Celtic supporters were marched to the game on foot.
Wason was arrested on 3 April 2025 and pleaded guilty to a single charge of breach of the peace.
Mark Chambers, defending, told the court: “He was 17 at the time.
“There was no individual act attributable to him but he was there.
“He plans to enrol in a college engineering course.”