From: Apple Product Security
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APPLE-SA-2014-12-18-1 Xcode 6.2 beta 3

Xcode 6.2 beta 3 is now available and addresses the following:

Git
Available for:  OS X Mavericks v10.9.4 or later
Impact:  Synching with a malicious git repository may allow
unexpected files to be added to the . [...]