tcf-agent: fetching over git:// no longer works

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 44a6cd03)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>