Use git tags?

Hello,

Can you use the git tag feature in order to release your source code?

Example:

```
$ git tag 1.21.1-am 75ce273c55a6fad764b066b8076cd3348e7610dd
$ git push origin --tags
```

It is very handy to get quickly the source code corresponding to a specific release instead of browsing the log.

Thank you.
Best regards.
