Add Header to fetch command

[azlam-abdulsalam]

This PR adds a header to the fetch command. This will display the pool from which the scratch org is being fetched and also the devhub org id

This is helpful when dealing with multiple devhubs


[codecov-commenter]

Codecov Report

Merging #648 (b699b37) into develop (d729fad) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #648   +/-   ##
========================================
  Coverage    64.58%   64.58%           
========================================
  Files           43       43           
  Lines         1423     1423           
  Branches       240      240           
========================================
  Hits           919      919           
  Misses         504      504           

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