git-mv-remote: rename a remote regardless of any existing remotes

bin/git-rename-remote

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+old=$1
+new=$2
+
+test -z $old && echo "old remote name required." 1>&2 && exit 1
+test -z $new && echo "new remote name required." 1>&2 && exit 1
+
+if ! git config --get "remote.$old.fetch" > /dev/null; then
+  echo "remote $old doesn't exist"
+  exit 1
+fi
+
+if git config --get "remote.$new.fetch" > /dev/null; then
+  git remote remove $new
+fi
+git remote rename $old $new
+git remote -v