In informal speaking we often use and after go and come before verbs like ask, buy, check, collect, do, find, get:
Why don’t you go and ask her?
I need to go and buy myself some running shoes.
Can you come and do the washing up?
She should go and find another job.
In informal American English speaking, we often leave out and:
Dad will come collect you on the way back from work.
I was expecting him to go get the keys.