My bashrc file

.bashrc

# Configure colors, if available.
if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
  c_reset='\[\e[0m\]'
  c_user='\[\e[1;33m\]'
  c_path='\[\e[0;33m\]'
  c_git_cleancleann='\[\e[0;36m\]'
  c_git_dirty='\[\e[0;35m\]'
else
  c_reset=
  c_user=
  c_git_cleancleann_path=
  c_git_clean=
  c_git_dirty=
fi

# Function to assemble the Git parsingart of our prompt.
git_prompt ()
{
  if ! git rev-parse --git-dir > /dev/null 2>&1; then
    return 0
  fi

  git_branch=$(git branch 2>/dev/null | sed -n '/^\*/s/^\* //p')

  if git diff --quiet 2>/dev/null >&2; then
    git_color="$c_git_clean"
  else
    git_color="$c_git_dirty"
  fi

  echo "[$git_color$git_branch${c_reset}]"
}

# Thy holy prompt.
PROMPT_COMMAND='PS1="${c_user}\u${c_reset}@${c_user}\h${c_reset}:${c_path}\w${c_reset} $(git_prompt)\$ "'


alias gs='git status'
# alias gl='git pull'

alias gd='git diff | mate'
alias ga='git add'
alias gf='git fetch'
alias gfp='git fetch -vp'
alias gc='git commit'
alias gca='git commit -v -a'
alias gb='git branch'
alias gr='git reset'
alias gba='git branch -a'
alias gob='git checkout -b'
alias got='git checkout -t'
alias gotb='git checkout --track -b'
alias glog='git log'
alias c='clear'

# Author.: Ole J
# Date...: 23.03.2008
# License: Whatever

# Wraps a completion function
# make-completion-wrapper <actual completion function> <name of new func.>
#                         <command name> <list supplied arguments>
# eg.
#   alias agi='apt-get install'
#   make-completion-wrapper _apt_get _apt_get_install apt-get install
# defines a function called _apt_get_install (that's $2) that will complete
# the 'agi' alias. (complete -F _apt_get_install agi)
#
function make-completion-wrapper () {
    local function_name="$2"
    local arg_count=$(($#-3))
    local comp_function_name="$1"
    shift 2
    local function="
    function $function_name {
        ((COMP_CWORD+=$arg_count))
        COMP_WORDS=( "$@" \${COMP_WORDS[@]:1} )
        "$comp_function_name"
        return 0
    }"
    eval "$function"
}

# and now the commands that are specific to this SO question

alias go='git checkout'

# we create a _git_checkout_mine function that will do the completion for "go"
# using the completion function "_git"
make-completion-wrapper _git _git_checkout_mine git checkout

# we tell bash to actually use _git_checkout_mine to complete "go"
complete -o bashdefault -o default -o nospace -F _git_checkout_mine go


alias gp='git push'

# we create a _git_checkout_mine function that will do the completion for "go"
# using the completion function "_git"
make-completion-wrapper _git _git_push_mine git push

# we tell bash to actually use _git_checkout_mine to complete "go"
complete -o bashdefault -o default -o nospace -F _git_push_mine gp


alias gl='git pull'
# we create a _git_checkout_mine function that will do the completion for "go"
# using the completion function "_git"
make-completion-wrapper _git _git_pull_mine git pull

# we tell bash to actually use _git_checkout_mine to complete "go"
complete -o bashdefault -o default -o nospace -F _git_pull_mine gl


alias gm='git merge'
# we create a _git_checkout_mine function that will do the completion for "go"
# using the completion function "_git"
make-completion-wrapper _git _git_checkout_mine git merge

# we tell bash to actually use _git_checkout_mine to complete "go"
complete -o bashdefault -o default -o nospace -F _git_checkout_mine gm