git provider implements scm update
git provider need the update command implementation
fixed in rev 684584.
NOTE git provider doens't support projects with modules as it's impossible a sub directory of a git repository.
When adding project with modules from a git repo you must check the box "For multi modules project, load only root as recursive build"
Git has a concept called 'submodules' but this has to be treated in a very special way:
Currently the maven-scm-providers-git does not implement this feature.
I'd have to experiment a bit, how to implement this best. I cannot remember if a scm provider has any chance to distinguish between a parent module and a submodule, but I'll try to.
Can you open an issue in maven-scm and send a proposal ?