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-rw-r--r--submodule.c4
-rwxr-xr-xt/lib-submodule-update.sh14
2 files changed, 17 insertions, 1 deletions
diff --git a/submodule.c b/submodule.c
index 2967704317..47ddc9b273 100644
--- a/submodule.c
+++ b/submodule.c
@@ -1657,7 +1657,9 @@ int submodule_move_head(const char *path,
else
argv_array_push(&cp.args, "-m");
- argv_array_push(&cp.args, old ? old : EMPTY_TREE_SHA1_HEX);
+ if (!(flags & SUBMODULE_MOVE_HEAD_FORCE))
+ argv_array_push(&cp.args, old ? old : EMPTY_TREE_SHA1_HEX);
+
argv_array_push(&cp.args, new ? new : EMPTY_TREE_SHA1_HEX);
if (run_command(&cp)) {
diff --git a/t/lib-submodule-update.sh b/t/lib-submodule-update.sh
index fb0173ea87..1f38a85371 100755
--- a/t/lib-submodule-update.sh
+++ b/t/lib-submodule-update.sh
@@ -1015,4 +1015,18 @@ test_submodule_forced_switch_recursing_with_args () {
test_submodule_content sub1 origin/modify_sub1
)
'
+
+ test_expect_success "$command: changed submodule worktree is reset" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ rm sub1/file1 &&
+ : >sub1/new_file &&
+ git -C sub1 add new_file &&
+ $command HEAD &&
+ test_path_is_file sub1/file1 &&
+ test_path_is_missing sub1/new_file
+ )
+ '
}