Add git fsck to verification.

Makefile

@@ -66,6 +66,7 @@ update:
 
 verify:
 	git verify-commit HEAD
+	git fsck
 
 vm:
 	nix run $(options) $(flake)#nixosConfigurations.$(hostname).config.system.build.vm

module/AutoUpdateSigned.nix

@@ -35,7 +35,7 @@ in {
 				rm -rf ./nixos
 				git clone --depth=1 --single-branch --branch=main ${const.url} ./nixos
 				pushd ./nixos
-				git verify-commit HEAD || {
+				git verify-commit HEAD && git fsck || {
 					echo "Verification failed."
 					exit 1
 				};