We use a directory iterator to return reflogs via the reflog iterator.
This iterator returns entries in the same order as readdir(3P) would and
will thus yield reflogs with no discernible order.

Set the new `DIR_ITERATOR_SORTED` flag that was introduced in the
preceding commit so that the order is deterministic. While the effect of
this can only been observed in a test tool, a subsequent commit will
start to expose this functionality to users via a new `git reflog list`
subcommand.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 refs/files-backend.c           | 6 +++---
 t/t0600-reffiles-backend.sh    | 4 ++--
 t/t1405-main-ref-store.sh      | 2 +-
 t/t1406-submodule-ref-store.sh | 2 +-
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/refs/files-backend.c b/refs/files-backend.c
index 75dcc21ecb..a7b7cdef36 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -2193,7 +2193,7 @@ static struct ref_iterator *reflog_iterator_begin(struct ref_store *ref_store,
 
 	strbuf_addf(&sb, "%s/logs", gitdir);
 
-	diter = dir_iterator_begin(sb.buf, 0);
+	diter = dir_iterator_begin(sb.buf, DIR_ITERATOR_SORTED);
 	if (!diter) {
 		strbuf_release(&sb);
 		return empty_ref_iterator_begin();
@@ -2202,7 +2202,7 @@ static struct ref_iterator *reflog_iterator_begin(struct ref_store *ref_store,
 	CALLOC_ARRAY(iter, 1);
 	ref_iterator = &iter->base;
 
-	base_ref_iterator_init(ref_iterator, &files_reflog_iterator_vtable, 0);
+	base_ref_iterator_init(ref_iterator, &files_reflog_iterator_vtable, 1);
 	iter->dir_iterator = diter;
 	iter->ref_store = ref_store;
 	strbuf_release(&sb);
@@ -2246,7 +2246,7 @@ static struct ref_iterator *files_reflog_iterator_begin(struct ref_store *ref_st
 		return reflog_iterator_begin(ref_store, refs->gitcommondir);
 	} else {
 		return merge_ref_iterator_begin(
-			0, reflog_iterator_begin(ref_store, refs->base.gitdir),
+			1, reflog_iterator_begin(ref_store, refs->base.gitdir),
 			reflog_iterator_begin(ref_store, refs->gitcommondir),
 			reflog_iterator_select, refs);
 	}
diff --git a/t/t0600-reffiles-backend.sh b/t/t0600-reffiles-backend.sh
index e6a5f1868f..4f860285cc 100755
--- a/t/t0600-reffiles-backend.sh
+++ b/t/t0600-reffiles-backend.sh
@@ -287,7 +287,7 @@ test_expect_success 'for_each_reflog()' '
 	mkdir -p     .git/worktrees/wt/logs/refs/bisect &&
 	echo $ZERO_OID > .git/worktrees/wt/logs/refs/bisect/wt-random &&
 
-	$RWT for-each-reflog | cut -d" " -f 2- | sort >actual &&
+	$RWT for-each-reflog | cut -d" " -f 2- >actual &&
 	cat >expected <<-\EOF &&
 	HEAD 0x1
 	PSEUDO-WT 0x0
@@ -297,7 +297,7 @@ test_expect_success 'for_each_reflog()' '
 	EOF
 	test_cmp expected actual &&
 
-	$RMAIN for-each-reflog | cut -d" " -f 2- | sort >actual &&
+	$RMAIN for-each-reflog | cut -d" " -f 2- >actual &&
 	cat >expected <<-\EOF &&
 	HEAD 0x1
 	PSEUDO-MAIN 0x0
diff --git a/t/t1405-main-ref-store.sh b/t/t1405-main-ref-store.sh
index 976bd71efb..cfb583f544 100755
--- a/t/t1405-main-ref-store.sh
+++ b/t/t1405-main-ref-store.sh
@@ -74,7 +74,7 @@ test_expect_success 'verify_ref(new-main)' '
 '
 
 test_expect_success 'for_each_reflog()' '
-	$RUN for-each-reflog | sort -k2 | cut -d" " -f 2- >actual &&
+	$RUN for-each-reflog | cut -d" " -f 2- >actual &&
 	cat >expected <<-\EOF &&
 	HEAD 0x1
 	refs/heads/main 0x0
diff --git a/t/t1406-submodule-ref-store.sh b/t/t1406-submodule-ref-store.sh
index e6a7f7334b..40332e23cc 100755
--- a/t/t1406-submodule-ref-store.sh
+++ b/t/t1406-submodule-ref-store.sh
@@ -63,7 +63,7 @@ test_expect_success 'verify_ref(new-main)' '
 '
 
 test_expect_success 'for_each_reflog()' '
-	$RUN for-each-reflog | sort | cut -d" " -f 2- >actual &&
+	$RUN for-each-reflog | cut -d" " -f 2- >actual &&
 	cat >expected <<-\EOF &&
 	HEAD 0x1
 	refs/heads/main 0x0
-- 
2.44.0-rc1