Thread: How do I fix this copper?

I was fortunate to be lent a copper to boil down this year's roar head.
It's been in the garden for a few months now, so should be ready to cook.

The problem is, it has a hole, dear Liza. 3 of them actually, all about the size of a pin head.
I have thought about soldering, I do have some heat resistant knead-it type bog. But I'm really not sure and would like to fix it so it doesn't leak all over the gas barby while making head soup.
Can anyone school me on the best and hopefully easiest remedy?