gh.sh

#!/bin/sh

current_git_branch() {
  git_exists=`git branch 2>/dev/null | sed -ne'/^\* /s///p'`

  if [[ "$git_exists" != "" ]]; then
    if [[ "$git_exists" == "(no branch)" ]]; then
      git_exists="\e[31m\]$git_exists\e[0m\]"
    fi
    echo "$git_exists "
  fi
  unset git_exists
}

extra="$1"
if [[ "$extra" == "" ]]; then
  extra=$(current_git_branch)
else
  extra=$(git rev-parse $1)
fi

extra="/commits/$extra"

open `git config -l | sed -En 's/remote.origin.url=git(@|:\/\/)github.com(:|\/)(.+)\/(.+).git/https:\/\/github.com\/\3\/\4/p'`$extra

Added the current_git_branch code inline.