function pull_request --argument-names target_branch source_branch
    if test -z "$target_branch"
        set target_branch (git symbolic-ref refs/remotes/origin/HEAD | sed 's@^refs/remotes/origin/@@')
        echo "Using default branch as target: "$target_branch
    end
    if test -z "$source_branch"
        set source_branch (git branch --show-current)
        echo "Using current branch as source: "$source_branch
    end

    # Format: ssh://git@git.source.akamai.com:7999/<project>/<repo>.git
    set --local origin  (git remote get-url origin)
    set --local project (string split -r -m2 '/' $origin)[-2]
    set --local repo    (basename -s .git $origin)

    open "https://git.source.akamai.com/projects/"$project"/repos/"$repo"/compare/commits?sourceBranch=refs%2Fheads%2F"$source_branch"&targetBranch=refs%2Fheads%2F"$target_branch
end