WIP: feat: cancel git clone ops gracefully

See #528

pkg/git/clone.go

@@ -32,6 +32,7 @@ func Clone(dir, url string) error {
 	defer signal.Stop(sigIntCh)
 
 	errCh := make(chan error)
+	waitCh := make(chan struct{})
 
 	go func() {
 		if _, err := os.Stat(dir); os.IsNotExist(err) {
@@ -73,9 +74,13 @@ func Clone(dir, url string) error {
 		} else {
 			log.Debugf("git clone: %s already exists", dir)
 		}
+
+		close(waitCh)
 	}()
 
 	select {
+	case <-waitCh:
+		return nil
 	case <-sigIntCh:
 		fmt.Println() // NOTE(d1): newline after ^C
 		if err := os.RemoveAll(dir); err != nil {