git-sync

#!/usr/bin/env bash
#
# Sync your current branch with it's remote counterpart.
#
# $1 - Optional remote name, defaults to origin. If you pass "all", all remotes will be synced to
# the current branch (or the branch passed as argument $2)
# $2 - Optional branch name, defaults to current branch
#
# Examples
#
#   git sync
#   git sync origin
#   git sync origin master
#
function sync_branch() {
    local current_branch_name remote branch_name all_remotes
    all_remotes=("$(git remote)")
    current_branch_name=$(git rev-parse --abbrev-ref HEAD)
    remotes=("${1:-origin}")
    if [[ $1 == "all" ]]; then
        remotes=("${all_remotes[@]}")
    fi
    branch_name=${2:-${current_branch_name}}
    for remote in "${remotes[@]}"; do
        echo "=== Syncing ${branch_name} -> ${remote}/${branch_name}"
        git pull --rebase "${remote}" "${branch_name}" && (git push "${remote}" "${branch_name}" && echo "=== Synced ${branch_name} -> ${remote}/${branch_name} sucessfully" || echo "=== Error when pushing changes to ${remote}/${branch_name}") || echo "=== Error when fetching changes from ${remote}/${branch_name}"
    done
}

sync_branch "$@"