Put the git-force-pull script on your PATH and voi-la, you can use git force-pull command

git-force-pull

#!/bin/sh

. "$(git --exec-path)/git-sh-setup"

USAGE="BRANCH"
_force_pull() {
    if [ $# = 1 ]; then
        git ls-remote -q --exit-code --heads origin $1 2>&1 1>/dev/null
        if [ $? = 0 ]; then
            git fetch origin $1
            git reset --hard origin/$1
        else
            die "Branch \`$1\` does not exist"
        fi
    else
        usage
    fi
}

_force_pull $1