disable git detection

Index: CMakeLists.txt
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -58,7 +58,7 @@ include(GNUInstallDirs)
 
 set(GIT_BRANCH_NAME "--unknown--")
 set(GIT_TAG_INFO "--unknown--")
-find_package (Git)
+#find_package (Git)
 if (GIT_FOUND AND EXISTS "${CMAKE_CURRENT_LIST_DIR}/.git/HEAD")
     execute_process(
         COMMAND ${GIT_EXECUTABLE} describe --tags --always
