commit ec38785b56433b06c0cd2b8508e41c598ff44d84
Author: Tuan Anh <anhht@smatec.com.vn>
Date:   Wed Nov 23 11:14:37 2022 +0700

    first add

diff --git a/main.txt b/main.txt
new file mode 100644
index 0000000..a9c5989
--- /dev/null
+++ b/main.txt
@@ -0,0 +1,2 @@
+hi git
+changes on b1
\ No newline at end of file