Aliases for fetch or pulling the git default branch

gpm.sh

function git_default_branch {
    # Guess the name of the remote -- either origin or the first other remote
    guessed_remote="$(
        (
            git remote | grep -P '^origin$'
            git remote | grep -P '^origin$' -v
         ) | head -n1 | tr -d '\n'
    )"
    git symbolic-ref "refs/remotes/$guessed_remote/HEAD" \
    | sed 's|^refs/remotes/[^/]\+/||'
}

alias gpm="git checkout \$(git_default_branch) && git pull"
alias gfm="git fetch origin && git branch -f \$(git_default_branch) origin/\$(git_default_branch)"