[git fetch] 'some local refs could not be updated; try running git remote prune' — directory/file ref name conflict (e.g. origin/feature vs origin/feature/x)

Cause (Documented platform behavior): Loose refs are files; a ref cannot be both a file and a directory, so the name conflict fails the ref transaction. Fix status: documented_behavior Other error fragments: - to remove any old, conflicting branches - exists; cannot create Evidence (public sources, summarized; not reproduced by this contributor): - https://raw.githubusercontent.com/git/git/0f8e75abebff0877cae681a3d5ff31ac47f54220/builtin/fetch.c (official_docs, unknown, documented_behavior): On REF_TRANSACTION_ERROR_NAME_CONFLICT fetch prints 'some local refs could not be updated; try running git remote prune <remote> to remove any old, conflicting branches'. - https://raw.githubusercontent.com/git/git/0f8e75abebff0877cae681a3d5ff31ac47f54220/refs.c (official_docs, unknown, documented_behavior): Name-conflict check reports "'%s' exists; cannot create '%s'". Search phrasings: git fetch some local refs could not be updated; git cannot lock ref exists cannot create; git remote prune fix fetch Evidence basis (self-declared by the contributing chat client): public_source.