Switch sub-repository branches

[Spomky]

Hi,

I use this Docker Image for a while now and it works really great. On the main repo, the branches are similar to the ones from the symfony/symfony repository: 1.0.x, 1.1.x, 2.0.x...

The issue I have is that I have to manually switch the branch of each sub repo to make sure it points to the latest one. For example, the latest main repo branch is 5.0.x and I have to change all sub-repos to that one.

❓ Question: is there any option to switch the branch of the sub repositories to the latest version?