Disable automatic git clone attempt for modules:
https://github.com/InsightSoftwareConsortium/ITK/issues/1157

--- a/CMake/ITKModuleRemote.cmake	2019-08-13 18:10:33.385472767 +0200
+++ b/CMake/ITKModuleRemote.cmake	2019-08-13 18:12:04.020198966 +0200
@@ -165,39 +165,4 @@
     set(Module_${_name} ON CACHE FORCE "${_description}")
   endif()
 
-  if(Module_${_name})
-    itk_download_attempt_check(Module_${_name})
-    include(CMakeParseArguments)
-    cmake_parse_arguments(_fetch_options "" "GIT_REPOSITORY;GIT_TAG" "" ${ARGN})
-    find_package(Git)
-    if(NOT GIT_EXECUTABLE)
-      message(FATAL_ERROR "error: could not find git for clone of ${_name}")
-    endif()
-    execute_process(
-      COMMAND "${GIT_EXECUTABLE}" --version
-      OUTPUT_VARIABLE ov
-      OUTPUT_STRIP_TRAILING_WHITESPACE
-      )
-    string(REGEX REPLACE "^git version (.+)$" "\\1" _version "${ov}")
-    if("${_version}" VERSION_LESS 1.6.6)
-      message(FATAL_ERROR "Git version 1.6.6 or later is required.")
-    endif()
-
-    set(REMOTE_GIT_TAG "${_fetch_options_GIT_TAG}")
-
-    if( DEFINED REMOTE_GIT_TAG_${_name} AND NOT "${REMOTE_GIT_TAG_${_name}}" STREQUAL "${_fetch_options_GIT_TAG}")
-      set(REMOTE_GIT_TAG "${REMOTE_GIT_TAG_${_name}}")
-      message(STATUS "NOTE: Using override 'REMOTE_GIT_TAG_${_name}=${REMOTE_GIT_TAG}'\n"
-                     "      instead of value 'GIT_TAG=${_fetch_options_GIT_TAG}'\n"
-                     "      specified in file ${ITK_SOURCE_DIR}/Modules/Remote/${_name}.remote.cmake'")
-    endif()
-    set(REMOTE_GIT_TAG_${_name} "${REMOTE_GIT_TAG}" CACHE STRING "Override default GIT_TAG value for remote module ${_name}")
-    mark_as_advanced(REMOTE_GIT_TAG_${_name})
-
-    _fetch_with_git("${GIT_EXECUTABLE}"
-      "${_fetch_options_GIT_REPOSITORY}"
-      "${REMOTE_GIT_TAG}"
-      "${ITK_SOURCE_DIR}/Modules/Remote/${_name}"
-      )
-  endif()
 endfunction()