Merge branch 'tb/commit-graph-no-check-oids'

Merge branch 'tb/commit-graph-no-check-oids'

Clean-up the commit-graph codepath.

* tb/commit-graph-no-check-oids:
  commit-graph: drop COMMIT_GRAPH_WRITE_CHECK_OIDS flag
  t5318: reorder test below 'graph_read_expect'
  commit-graph.c: simplify 'fill_oids_from_commits'
  builtin/commit-graph.c: dereference tags in builtin
  builtin/commit-graph.c: extract 'read_one_commit()'
  commit-graph.c: peel refs in 'add_ref_to_set'
  commit-graph.c: show progress of finding reachable commits
  commit-graph.c: extract 'refs_cb_data'