Changing Password text (passwd command)

I'm running RHEL 7.3. I have a question about the passwd command.
I'm trying to change the text that the user is promoted with when they are asked for their current password.

When running passwd, RHEL displays:

Changing password for user *****
Changing password for *****
(current) UNIX password: ___________

In my circumstance, I'm looking to replace the word UNIX above with the HOSTNAME of the server.

Can this be done?

Thank You!