fix(git): isolate catalog commands from parent hook environment

src/lib/services/git-process-environment.ts

@@ -0,0 +1,19 @@
+/** Git hooks export paths belonging to their repository. Never reuse them for a different checkout. */
+export function gitProcessEnvironment(
+	source: NodeJS.ProcessEnv = process.env,
+): NodeJS.ProcessEnv {
+	const environment = { ...source };
+	for (const name of [
+		"GIT_DIR",
+		"GIT_WORK_TREE",
+		"GIT_INDEX_FILE",
+		"GIT_COMMON_DIR",
+		"GIT_OBJECT_DIRECTORY",
+		"GIT_ALTERNATE_OBJECT_DIRECTORIES",
+		"GIT_PREFIX",
+		"GIT_IMPLICIT_WORK_TREE",
+		"GIT_GRAFT_FILE",
+	])
+		delete environment[name];
+	return environment;
+}