GetExternalCode: Use GIT_VERSION instead GIT_TAG to checkout branch/t…

…ag/hash (#98)

* GetExternalCode: Use GIT_VERSION instead GIT_TAG to checkout branch/tag/hash

* GetExternalCode: Update Version info comment with more details

DeviceIdentification/CMakeLists.txt

@@ -67,11 +67,11 @@ elseif (NEXUS_FOUND)
                 ${DEVICEIDENTIFICATION_IMPLEMENTATION_PATH}/Nexus.cpp)
     else()
         include(GetExternalCode)
-        set(DEVICEIDENTIFICATION_IMPLEMENTATION_VERSION "master" CACHE STRING "DeviceIdentification implementation version")
+        set(DEVICEIDENTIFICATION_IMPLEMENTATION_VERSION "master" CACHE STRING "DeviceIdentification implementation version: commit_id_or_tag_or_branch_name")
         set(DEVICEIDENTIFICATION_IMPLEMENTATION_REPOSITORY "https://code.rdkcentral.com/r/soc/broadcom/components/rdkcentral/thundernanoservices/DeviceIdentification" CACHE STRING "DeviceIdentification implementation repository")
         GetExternalCode(
             GIT_REPOSITORY ${DEVICEIDENTIFICATION_IMPLEMENTATION_REPOSITORY}
-            GIT_TAG ${DEVICEIDENTIFICATION_IMPLEMENTATION_VERSION}
+            GIT_VERSION ${DEVICEIDENTIFICATION_IMPLEMENTATION_VERSION}
             SOURCE_DIR "Implementation/Nexus"
         )
         target_sources(${MODULE_NAME}