Changing Text using Relationship ID (rId)

[finder]

Hello. I know the relationship ID of a hyperlink. How do I change the text of the hyperlink using relationship ID? or do I need the relationship ID to change the text of a hyperlink?

Referencing the package explorer:

<w:p>
<w:hyperlink w:history="true" r:id="rId4">
<w:r>
<w:rPr>
<w:rStyle w:val="Hyperlink"/>
</w:rPr>
<w:t>Hello</w:t>
</w:r>
</w:hyperlink>
</w:p>
<w:p>
<w:bookmarkStart w:name="_GoBack" w:id="0"/>
<w:bookmarkEnd w:id="0"/>
</w:p>

I'd like to change what is in the <w:t> by using the r:id as the parameter.

Thank you.