From 1b18180ed4a808f706c4df2f03826e7e9804487b Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Wed, 8 Jun 2016 09:58:43 -0400
Subject: [PATCH] Help: Document CTest Git fetch-and-reset behavior

---
 Help/manual/ctest.1.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Help/manual/ctest.1.rst b/Help/manual/ctest.1.rst
index 1179f5665..e79733300 100644
--- a/Help/manual/ctest.1.rst
+++ b/Help/manual/ctest.1.rst
@@ -589,6 +589,11 @@ Configuration settings to specify the version control tool include:
   * `CTest Script`_ variable: :variable:`CTEST_GIT_COMMAND`
   * :module:`CTest` module variable: ``GITCOMMAND``
 
+  The source tree is updated by ``git fetch`` followed by
+  ``git reset --hard`` to the ``FETCH_HEAD``.  The result is the same
+  as ``git pull`` except that any local moficiations are overwritten.
+  Use ``GITUpdateCustom`` to specify a different approach.
+
 ``GITInitSubmodules``
   If set, CTest will update the repository's submodules before updating.