Hi - I'm not 100% sure but I think what you're asking is how to store the UTM parameters dynamically in Marketo when somebody clicks the link. if that is true, you need to use the solution around creating hidden fields on your form, and driving UTM parameters into that form. There are some instructions here on Docs: Set a Hidden Form Field Value - Marketo Docs - Product Docs
This will give you a starting point. Look at the section here specifically on capturing UTM parameters.