Provide a way to exclude a repo from being watched when you use org/*

[benmatselby]

No description provided.

[codecov]

Codecov Report

Merging #16 into master will increase coverage by 0.27%.
The diff coverage is 95%.

@@            Coverage Diff             @@
##           master      #16      +/-   ##
==========================================
+ Coverage   36.95%   37.23%   +0.27%     
==========================================
  Files          13       13              
  Lines         414      419       +5     
==========================================
+ Hits          153      156       +3     
- Misses        250      251       +1     
- Partials       11       12       +1

Impacted Files	Coverage Δ
cmd/github/github.go	58.2% <95%> (+0.14%)	⬆️

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