based on: http://genius.com/Andrew-warner-git-getpull-quickly-find-the-pull-request-that-merged-your-commit-to-master-annotated ...updated to parse both GitHub and BitBucket repo urls

git-getpull

#!/bin/sh

if [ -z "$1" ]; then
  echo "Usage: git getpull <SHA>"
  exit 1
elif [ -z "$(git rev-parse --git-dir 2>/dev/null)" ]; then
  echo "Not in a git directory"
  exit 1
else
  repo_details=( \
    $(git config --get remote.origin.url 2>/dev/null \
    | perl -lne 'print "$1 $2" if m%(?:[a-z0-9-.]+@|https?://)([a-z0-9-.]+)(?:[:/])(.*?).git%') \
  )
  git_host=${repo_details[0]}
  repository_path=${repo_details[1]}
  pull_id=$(\
    git log $1..master --ancestry-path --merges --oneline 2>/dev/null \
    | tail -n 1 | perl -nle 'print $1 if /#(\d+)/' \
  )

  if [ -n "$pull_id" ]; then
    if [ "$git_host" = "bitbucket.org" ]; then
      echo https://bitbucket.org/$repository_path/pull-requests/$pull_id
    elif [ "$git_host" = "github.com" ]; then
      echo https://github.com/$repository_path/pull/$pull_id
    else
      echo $pull_id
    fi
  else
    echo "Sorry, couldn't find that pull"
    exit 1
  fi
fi

To use:

1. copy this script to /usr/local/bin/git-getpull
2. $ git getpull fc0358