Automatic merge from submit-queue (batch tested with PRs 49129, 50436, 50417, 50553, 47587)

Avoid rsync of .git directory

**What this PR does / why we need it**:

We don't really need the .git directory to be transferred. This
problem was introduced in the PR #46193:
"Run the update-staging-godeps script inside a docker container"


**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:
Fixes #50272

**Release note**:

```release-note
NONE
```