How can I pass git SHA1 to compiler as definition using cmake?

How can I pass git SHA1 to compiler as definition using cmake?

git cmake sha1

git

How to create Xcode project from already existing git cmake project?

c++ xcode git macos cmake

git

How to clone and integrate external (from git) cmake project into local one

c++ git cmake googletest

git

CMake ExternalProject: how to specify relative path to the root CMakeLists.txt?

git build cmake build-process build-automation

git

CMake ExternalProject_Add Git

git cmake external-project

git