In the git section there are the following git specific settings:
GC Cron Expression
If this is set, SCM-Manager will execute a git garbage collection matching the given cron expression.
Disable Non Fast-Forward
Activate this to reject forced pushes that are not fast forwards.
The branch name configured here will be used for the initialization of new repositories. Please mind, that due to git internals this cannot work for empty repositories (here git will always use its internal default branch, so at the time being
LFS authorization expiration
Sets the expiration time of the authorization token generated for LFS put requests in minutes. If SCM-Manager is run behind a reverse proxy that buffers http requests (eg. Nginx), this should set up to the time, an LFS upload may take at maximum. If you experience errors during long-running LFS push requests, this may have to be increased. The default value is 5 minutes.