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Predicate git_default_branch/2
Availability::- use_module(library(git)).(can be autoloaded)
 git_default_branch(-BranchName, +Options) is det
True when BranchName is the default branch of a repository. This is hard to define. If possible, we perform rev-parse on origin/HEAD. If not, we look at branches shared between the local and remote and select main or master or the first common breach. Options:
Remote used to detect the default branch. Default is origin.
 git_default_branch(-BranchName, +Options) is semidet
True when BranchName is the current branch of a repository. Fails if the repo HEAD is detached