.git config

[core]
  ...
[remote "dokku"]
  url = git@remote:appname
  fetch = +refs/heads/*:refs/remotes/dokku/*

dokku.bash

# Looks for the git remote "dokku" and runs dokku command via SSH
# Assumes user is root and no password is needed
# Example:
#   dokku logs --> ssh root@remote 'dokku logs appname'
dokku() {
  if [ -f ".git/config" ]; then
    config=$(cat .git/config)
    
    if [[ "$config" == *'[remote "dokku"]'* ]]; then
    
      host=$(echo $config | sed 's/.*\[remote "dokku"\][[:space:]]*url[[:space:]]*=[[:space:]]git@\([a-z.0-9\-]*\):\([a-z.0-9\-\_]*\).*/\1/')
      app=$(echo $config | sed 's/.*\[remote "dokku"\][[:space:]]*url[[:space:]]*=[[:space:]]git@\([a-z.0-9\-]*\):\([a-z.0-9\-\_]*\).*/\2/')
  
      dokku_command="$1"
  
      if [ "$dokku_command" == "logs" ]; then
        eval "ssh root@$host 'dokku logs $app'"
      elif [ "$dokku_command" == "run" ]; then
        shift 1
        eval "ssh root@$host 'dokku run $app $@'"
      elif [ "$dokku_command" == "url" ]; then
        eval "ssh root@$host 'dokku url $app'"
      else
        echo "       Host: $host  App: $app"
        echo "Usage:"
        echo "  dokku logs      Show the last logs for the application"
        echo "  dokku run <cmd> Run a command in the environment of the application"
        echo "  dokku url       Show the URL for the application"
      fi
    else
      echo 'Could not find a git remote named "dokku".'
    fi
  else
    echo "Not a git repository."
  fi
}