diff --git a/testdata/detachedhead b/testdata/detachedhead
new file mode 160000
index 00000000..a9f0def8
--- /dev/null
+++ b/testdata/detachedhead
@@ -0,0 +1 @@
+Subproject commit a9f0def8fa9582c93ba74e2c5507ea1869930d3b
diff --git a/testdata/notagsrepo b/testdata/notagsrepo
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--- /dev/null
+++ b/testdata/notagsrepo
@@ -0,0 +1 @@
+Subproject commit d141ad60940e9258f7b9711cfc10a26e031728b4
diff --git a/testdata/tagsrepo b/testdata/tagsrepo
new file mode 160000
index 00000000..32323748
--- /dev/null
+++ b/testdata/tagsrepo
@@ -0,0 +1 @@
+Subproject commit 323237487d102dc1f0b124064f22fc727cd745a2