Ricardo Pardini 67b3e0dd07 git: fetch_from_repo(): introduce FETCH_FROM_REPO_CALLBACK_IF_REF_MUTABLE
- function defined in FETCH_FROM_REPO_CALLBACK_IF_REF_MUTABLE is called if reference is mutable
  - which is anything that's not `commit:` or `tag:`
    - and really there's no guarantee that `tag:` is immutable, but lets assume
2023-11-25 13:38:10 +01:00
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