Disable git commit hash calculation, because the current approach must be completely replaced.

CMakeLists.txt

@@ -152,11 +152,6 @@ if (CLANG OR GCC)
   endif()
 endif()
 
-if (NOT DEFINED TD_GIT_COMMIT)
-  include(GetGitInfo)
-  get_git_info()
-endif()
-
 add_subdirectory(tdtl)
 
 add_subdirectory(tdutils)

tdutils/CMakeLists.txt

@@ -343,6 +343,9 @@ set(TDUTILS_TEST_SOURCE
 add_library(tdutils STATIC ${TDUTILS_SOURCE})
 
 if (DEFINED TD_GIT_COMMIT)
+  # this forces the whole tdutils to be recompiled after each commit with Makefile generator as explained at
+  # https://cmake.org/pipermail/cmake-developers/2012-October/005411.html,
+  # so this can't be improved for production-ready state
   set_property(SOURCE td/utils/GitInfo.cpp APPEND PROPERTY COMPILE_DEFINITIONS "GIT_COMMIT=\"${TD_GIT_COMMIT}\"")
 endif()
 if (DEFINED TD_GIT_DIRTY)