This shell script gives you the ability to get your git the version as well as the commit hash pretty easily, via two handy utility functions

git_ver.sh

#!/bin/bash

#Get Version
version() {
    git ls-remote --tags $1 | awk -F/ '{ print $3 }' | tail -n1
}
# Get commit hash
hash() {
    git ls-remote --tags $1 | awk -F/ '{ print substr($1,0,7) }' | tail -n1
}

case $1 in
version)
    "$@"
    exit
    ;;
commit)
    "$@"
    exit
    ;;
esac