Add support to query latest revision. This makes it possble to use
osc fetcher without specifying the rev parameter.
(Bitbake rev: aa4cee1bb7415c498e4dc6af4dbb3d0c841faf2e)
Signed-off-by: Gunjan Gupta <viraniac@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>