Git - git sync issue on an empty repo

- VSCode Version: 1.46.1
- OS Version: macOS 10.15.5

Steps to Reproduce:

```sh
# create empty repo test1
git clone https://.../test1.git test1_01
git clone https://.../test1.git test1_02
cd test1_01
code ./
# add 1.txt -> commit -> sync
cd ../test1_02
code ./
# click sync: I expect changes will be synced
```
