Use $GIT_URL in scripts to avoid https CA cert failure.

Use $GIT_URL in scripts to avoid https CA cert failure.

- git clone using https fails due to expired CA certificate,
  but project repo git clone works using git transfer protocol.
  Use $GIT_URL for clone command in scripts which use the git
  transfer protocol to the git mirror (same as git clone
  of project repo's) instead of https to the public gerrit ip
  address.

Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
Change-Id: I15ef9e79e7e32d1561f6c452d192048f04c55caa