scripts: Add `delete-remote-refs.sh`

Useful for deleting refs of a corrupted remote.

scripts/delete-remote-refs.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+set -e
+
+if [ "$#" -lt 2 ]; then
+  printf "usage: %s <rid> <nid>\n" "$(basename "$0")"
+  exit 1
+fi
+
+RAD_HOME=${RAD_HOME:-"$HOME/.radicle"}
+REPO=$1
+REMOTE=$2
+
+cd $RAD_HOME/storage/$1
+
+refs=$(git for-each-ref --format="%(refname)")
+pattern="refs/namespaces/$2/refs/*"
+
+for ref in $refs; do
+  case "$ref" in
+    $pattern)
+      git update-ref -d "$ref"
+      printf 'Deleted %s\n' "$ref"
+      ;;
+  esac
+done
+
+git gc