fzf + `git checkout`

.zshrc

function gxo() {
    local branches branch

    branches=$(git for-each-ref --sort=-committerdate refs/heads/ --format='%(refname:short)') || return

    # Add a separator and then list all branches 
    branches="$branches"$'\n'"$(git branch --all | grep -v '\->' | sed 's/^[* ]*//')" || return

    # Use fzf to select a branch + added useless but cool looking graph
    branch=$(echo "$branches" | fzf --height 40% --border --preview 'git log --oneline --graph --decorate --color=always {}') || return


    git checkout $(echo "$branch" | sed 's#^remotes/[^/]*/##')
}