I would like to know how to return a specific key from a Hash?

Example:

moves = Hash["Kick", 100, "Punch", 50]

How would I return the first key "Kick" from this Hash?

NOTE: I'm aware that the following function will return all keys from the hash but I'm just interested in returning one key. 

moves.keys #=> ["Kick", "Punch"]
ruby hash key
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