diff --git a/tools/fetch-rebase-pull-request b/tools/fetch-rebase-pull-request
index bb484a8f7e..df1661d7f0 100755
--- a/tools/fetch-rebase-pull-request
+++ b/tools/fetch-rebase-pull-request
@@ -1,9 +1,10 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 set -x
 
 request_id="$1"
-git fetch upstream "pull/$request_id/head"
-git checkout upstream/master -b "review-${request_id}"
+remote=${2:-"upstream"}
+git fetch "$remote" "pull/$request_id/head"
+git checkout -B "review-${request_id}" $remote/master
 git reset --hard FETCH_HEAD
 git pull --rebase
diff --git a/tools/reset-to-pull-request b/tools/reset-to-pull-request
index af8b5b11a0..7d8d69933a 100755
--- a/tools/reset-to-pull-request
+++ b/tools/reset-to-pull-request
@@ -1,7 +1,8 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 set -x
 
 request_id="$1"
-git fetch upstream "pull/$request_id/head"
+remote=${2:-"upstream"}
+git fetch "$remote" "pull/$request_id/head"
 git reset --hard FETCH_HEAD