解决repo init error: could not verify the tag 'v1.12.7'

repo init 的时候出现错误
object 12fd10c20115046dcd2fbe468a45e566f38ffbc9
type commit
tag v1.12.7
tagger Conley Owens <[email protected]> 1381959964 -0700

repo 1.12.7

gpg: Signature made 2013年10月17日 星期四 05时46分04秒 CST using RSA key ID 692B382C
gpg: Can't check signature: public key not found

error: could not verify the tag 'v1.12.7'

解决方法：
curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
chmod a+x ~/bin/repo