CMake prefers git.exe installed by VS2017

I just submitted issue report to Visual Studio 2017: https://developercommunity.visualstudio.com/content/problem/26539/vs2017-deployed-gitexe-not-usable.html

I am, however, not clear where might be the problem, so I'm also letting the CMake Team know about the problem here.

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Environment

• Windows 10
• Visual Studio Professional 2017 (Version 15.0.26228.4)
• Git 2.11.1.windows.1 (C:\Program Files\Git\cmd\git.EXE in PATH)

Problem

I have a project, https://github.com/lexicalunit/nanodbc/, with CMakeLists.txt which calls git to add external project:

find_package(Git REQUIRED)
ExternalProject_Add(
  catch
  PREFIX ${CMAKE_BINARY_DIR}/catch
  GIT_REPOSITORY https://github.com/philsquared/Catch.git
  UPDATE_COMMAND ${GIT_EXECUTABLE} pull
  CONFIGURE_COMMAND ""
  BUILD_COMMAND ""
  INSTALL_COMMAND ""
  LOG_DOWNLOAD ON)

In Visual Studio 2017 command prompt, I run CMake to configure the build and CMake generates custom build step file catch-gitclone.cmake.

CMake seems to prefer git.exe from the VS2017 installation instead of the one available in PATH

execute_process(
  COMMAND "C:/Program Files (x86)/Microsoft Visual Studio/2017/Professional/Common7/IDE/CommonExtensions/Microsoft/TeamFoundation/Team Explorer/Git/cmd/git.exe" ${git_options} checkout master --
  WORKING_DIRECTORY "D:/dev/nanodbc/_build32/catch/src/catch"
  RESULT_VARIABLE error_code
  )

The problem is, that C:/Program Files (x86)/Microsoft Visual Studio/2017/Professional/Common7/IDE/CommonExtensions/Microsoft/TeamFoundation/Team Explorer/Git/cmd/git.exe seems not directly usable (either a bug or by design, who knows) and the git clone terminates with System Error prompts about missing DLLs: libintl-8.dll, , libcurl-4.dll, libpcre-1.dll, libssp-0.dll

Perhaps it is something that could be corrected, so CMake prefers C:\Program Files\Git\cmd\git.EXE which is available in the PATH.