# Updating proto subrepo

The [`./proto`](../proto/) subrepository can be updated easily via the
[git-subrepo] git extension as follow:


```bash
$ git subrepo pull ./proto
# ..
```

Note that in case the branch specified in the [`.gitrepo`][gitrepo-file] file
does not correspond to your intended target, you can always use the `--branch`
option to specify another branch (e.g.: `master`) or even a specific git
changeset hash.

[gitrepo-file]: ../proto/.gitrepo
[git-subrepo]: https://github.com/ingydotnet/git-subrepo


## Known issues

### Error "fatal: Not a valid object name"

If the latest `subrepo` commit has been rebased, further subrepo commands won't
work anymore.

If it occurs to you, you need to find the new parent of this commit (once
rebased), go to the `.gitrepo` file and replace `parent` with the hash of the
new parent.

Note that you need to commit this change to repair the `git subrepo` command.


#### References

 -  [fatal: Not a valid object name: ''. · Issue #348 · ingydotnet/git-subrepo](https://github.com/ingydotnet/git-subrepo/issues/348)