Fix bd sync git pull command to be explicit about remote and branch

cmd/bd/sync.go

@@ -323,7 +323,25 @@ func gitCommit(ctx context.Context, filePath string, message string) error {
 
 // gitPull pulls from the current branch's upstream
 func gitPull(ctx context.Context) error {
-	cmd := exec.CommandContext(ctx, "git", "pull")
+	// Get current branch name
+	branchCmd := exec.CommandContext(ctx, "git", "rev-parse", "--abbrev-ref", "HEAD")
+	branchOutput, err := branchCmd.Output()
+	if err != nil {
+		return fmt.Errorf("failed to get current branch: %w", err)
+	}
+	branch := strings.TrimSpace(string(branchOutput))
+	
+	// Get remote name for current branch (usually "origin")
+	remoteCmd := exec.CommandContext(ctx, "git", "config", "--get", fmt.Sprintf("branch.%s.remote", branch))
+	remoteOutput, err := remoteCmd.Output()
+	if err != nil {
+		// If no remote configured, default to "origin"
+		remoteOutput = []byte("origin\n")
+	}
+	remote := strings.TrimSpace(string(remoteOutput))
+	
+	// Pull with explicit remote and branch
+	cmd := exec.CommandContext(ctx, "git", "pull", remote, branch)
 	output, err := cmd.CombinedOutput()
 	if err != nil {
 		return fmt.Errorf("git pull failed: %w\n%s", err, output)