possibility of race condition in commit mode?

[pdeva]

can this action run in this race condition when in commit mode?:

1. commit A is pushed in a PR
2. rustfmt-check is running and detects it needs to push a commit with formatted rust code and pushes commit B.
3. meanwhile user pushed commit C with new code.
4. commit B from rustfmt-check arrives later than commit C, and this commit B ends up overwriting commit C.

[mbrobbel]

B from the rustfmt-check would be rejected if it's pushed after C.

We would have to explicitly set force with updateRef to overwrite.