Ask the rollback test's failed build after the registered one, whenever it runs

Its id named 2026-10-10 02:40 UTC; once the clock passed that, the
registered build read as newer and the test failed on main.

cmd/mesh-controller/build_source_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"fmt"
 	"hash/fnv"
 	"os"
 	"os/exec"
@@ -11,6 +12,7 @@ import (
 	"strings"
 	"sync"
 	"testing"
+	"time"
 
 	"github.com/novox/mesh-controller/internal/inventory"
 	"github.com/novox/mesh-controller/internal/link"
@@ -208,7 +210,9 @@ func TestARollbackNeverPutsBackABuildFromAnotherRepository(t *testing.T) {
 	if _, _, err := takeIn(ctx, inv, fork); !errors.Is(err, errNotItsSource) {
 		t.Fatalf("the fork's build was taken in: %v", err)
 	}
-	failed := onTrunk("build-1791600000000000000", "novox/mesh-catalog", "git", "modules/sudo",
+	// Asked after the registered build, whenever the test runs: an id naming a fixed moment read as older
+	// than the registered build once the clock passed it (2026-10-10 02:40 UTC), and the test failed on main.
+	failed := onTrunk(fmt.Sprintf("build-%d", time.Now().Add(time.Hour).UnixNano()), "novox/mesh-catalog", "git", "modules/sudo",
 		map[string]any{"module": "sudo", "version": "2"})
 	failed.Commit = "badbadbad0123456"
 	if _, _, err := takeIn(ctx, inv, failed); err != nil {