Is github desktop app using a custom version of git ? Having update to git 1.9.5 and the github application to 2.6.5 i still got "git --version" to return 1.9.

Is github desktop app using a custom version of git ? Having update to git 1.9.5 and the github application to 2.6.5 i still got "git --version" to return 1.9.4 for mysisgit in git shell. Is this normal ?