Try with:
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(CRTTracking)
find_package(ROOT REQUIRED)
set(CMAKE_CXX_FLAGS "${ROOT_CXX_FLAGS}")
include(${ROOT_USE_FILE})
add_executable(CRTTracking ${CMAKE_CURRENT_SOURCE_DIR}/src/CRTTracking.cxx)
target_include_directories(CRTTracking PUBLIC
${CMAKE_CURRENT_SOURCE_DIR}/src ${ROOT_INCLUDE_DIRS})
target_link_directories(${ROOT_LIBRARY_DIR})
target_link_libraries(CRTTracking ${ROOT_LIBRARIES})
install(TARGETS CRTTracking
DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/bin)