1 files changed, 6 insertions, 0 deletions
diff --git a/refs.c b/refs.c
index d1e1b4399b..a3d5f42e37 100644
--- a/refs.c
+++ b/refs.c
@@ -1643,6 +1643,12 @@ int ref_transaction_commit(struct ref_transaction *transaction,
 {
 	struct ref_store *refs = transaction->ref_store;
 
+	if (getenv(GIT_QUARANTINE_ENVIRONMENT)) {
+		strbuf_addstr(err,
+			      _("ref updates forbidden inside quarantine environment"));
+		return -1;
+	}
+
 	return refs->be->transaction_commit(refs, transaction, err);
 }