This namespace affects all reference operations for the repo.
See man gitnamespaces
@param repo The repo
@param nmspace The namespace. This should not include the refs
folder, e.g. to namespace all references under refs/namespaces/foo/,
use foo as the namespace.
@return 0 on success, -1 on error
Sets the active namespace for this Git Repository
This namespace affects all reference operations for the repo. See man gitnamespaces
@param repo The repo @param nmspace The namespace. This should not include the refs folder, e.g. to namespace all references under refs/namespaces/foo/, use foo as the namespace. @return 0 on success, -1 on error