Find all refs with desired suffix; choose shortest one
Replace tab indentation with spaces
Use exact match to locate remote revision
Update specs for exact match on remote revisions
Add fallback search for exact revision entered
Merge branch 'master' of https://github.com/opscode/chef
Add test for matching heads when no tag matches
Merge branch 'master'
Merge pull request #2079 from jbence/CHEF-2065

Use exact match to locate remote git-reference