Patrick Steinhardt [off-list ref] writes:

Refactor `read_ref_without_reload()` to accept a `struct reftable_stack`

Do you mean `struct reftable_backend` here?

as input instead of accepting a `struct reftable_stack`. This allows us
to implement an additional caching layer when reading refs where we can
reuse reftable iterators.

Nit: This commit also refactors the function to use the newly defined
'REFTABLE_HASH_*'. Maybe worth mentioning in the commit.

The patch itself looks good!

[snip]