How Do I Copy Only the Text Of a Hyperlink?

For example, I have purchased an item on ebay and recveived an HTML email with the USPS Tracking number as a hyperlink. If I click the link it opens ebay’s page which takes two more clicks to get the actual tracking info. I want to copy the tracking number and paste it into the USPS page and track that way but if I use the traditional method the entire hyperlink is pasted into the USPS tracking number field.
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Mark