diff --git a/devel/arcanist-lib/Makefile b/devel/arcanist-lib/Makefile
--- a/devel/arcanist-lib/Makefile
+++ b/devel/arcanist-lib/Makefile
@@ -1,6 +1,6 @@
 PORTNAME?=	arcanist
 PORTVERSION?=	20220518
-PORTREVISION?=	1
+PORTREVISION?=	2
 CATEGORIES?=	devel
 PKGNAMESUFFIX=	${SLAVE_PKGNAMESUFFIX}${PHP_PKGNAMESUFFIX}
 
diff --git a/devel/arcanist-lib/files/patch-src_repository_api_ArcanistGitAPI.php b/devel/arcanist-lib/files/patch-src_repository_api_ArcanistGitAPI.php
new file mode 100644
--- /dev/null
+++ b/devel/arcanist-lib/files/patch-src_repository_api_ArcanistGitAPI.php
@@ -0,0 +1,11 @@
+--- src/repository/api/ArcanistGitAPI.php.orig	2023-01-06 17:27:38 UTC
++++ src/repository/api/ArcanistGitAPI.php
+@@ -1143,7 +1143,7 @@ final class ArcanistGitAPI extends ArcanistRepositoryA
+ 
+   public function hasLocalCommit($commit) {
+     try {
+-      if (!$this->getCanonicalRevisionName($commit)) {
++      if (!$this->getCanonicalRevisionName($commit ?? '')) {
+         return false;
+       }
+     } catch (CommandException $exception) {