diff --git a/contrib/packaging/requirements-windows-py3.txt b/contrib/packaging/requirements-windows-py3.txt
--- a/contrib/packaging/requirements-windows-py3.txt
+++ b/contrib/packaging/requirements-windows-py3.txt
@@ -4,10 +4,50 @@
 #
 #    pip-compile --generate-hashes --output-file=contrib/packaging/requirements-windows-py3.txt contrib/packaging/requirements-windows.txt.in
 #
+cached-property==1.5.2 \
+    --hash=sha256:9fa5755838eecbb2d234c3aa390bd80fbd3ac6b6869109bfc1b499f7bd89a130 \
+    --hash=sha256:df4f613cf7ad9a588cc381aaf4a512d26265ecebd5eb9e1ba12f1319eb85a6a0 \
+    # via pygit2
 certifi==2020.6.20 \
     --hash=sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3 \
     --hash=sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41 \
     # via dulwich
+cffi==1.14.4 \
+    --hash=sha256:00a1ba5e2e95684448de9b89888ccd02c98d512064b4cb987d48f4b40aa0421e \
+    --hash=sha256:00e28066507bfc3fe865a31f325c8391a1ac2916219340f87dfad602c3e48e5d \
+    --hash=sha256:045d792900a75e8b1e1b0ab6787dd733a8190ffcf80e8c8ceb2fb10a29ff238a \
+    --hash=sha256:0638c3ae1a0edfb77c6765d487fee624d2b1ee1bdfeffc1f0b58c64d149e7eec \
+    --hash=sha256:105abaf8a6075dc96c1fe5ae7aae073f4696f2905fde6aeada4c9d2926752362 \
+    --hash=sha256:155136b51fd733fa94e1c2ea5211dcd4c8879869008fc811648f16541bf99668 \
+    --hash=sha256:1a465cbe98a7fd391d47dce4b8f7e5b921e6cd805ef421d04f5f66ba8f06086c \
+    --hash=sha256:1d2c4994f515e5b485fd6d3a73d05526aa0fcf248eb135996b088d25dfa1865b \
+    --hash=sha256:2c24d61263f511551f740d1a065eb0212db1dbbbbd241db758f5244281590c06 \
+    --hash=sha256:51a8b381b16ddd370178a65360ebe15fbc1c71cf6f584613a7ea08bfad946698 \
+    --hash=sha256:594234691ac0e9b770aee9fcdb8fa02c22e43e5c619456efd0d6c2bf276f3eb2 \
+    --hash=sha256:5cf4be6c304ad0b6602f5c4e90e2f59b47653ac1ed9c662ed379fe48a8f26b0c \
+    --hash=sha256:64081b3f8f6f3c3de6191ec89d7dc6c86a8a43911f7ecb422c60e90c70be41c7 \
+    --hash=sha256:6bc25fc545a6b3d57b5f8618e59fc13d3a3a68431e8ca5fd4c13241cd70d0009 \
+    --hash=sha256:798caa2a2384b1cbe8a2a139d80734c9db54f9cc155c99d7cc92441a23871c03 \
+    --hash=sha256:7c6b1dece89874d9541fc974917b631406233ea0440d0bdfbb8e03bf39a49b3b \
+    --hash=sha256:840793c68105fe031f34d6a086eaea153a0cd5c491cde82a74b420edd0a2b909 \
+    --hash=sha256:8d6603078baf4e11edc4168a514c5ce5b3ba6e3e9c374298cb88437957960a53 \
+    --hash=sha256:9cc46bc107224ff5b6d04369e7c595acb700c3613ad7bcf2e2012f62ece80c35 \
+    --hash=sha256:9f7a31251289b2ab6d4012f6e83e58bc3b96bd151f5b5262467f4bb6b34a7c26 \
+    --hash=sha256:9ffb888f19d54a4d4dfd4b3f29bc2c16aa4972f1c2ab9c4ab09b8ab8685b9c2b \
+    --hash=sha256:a7711edca4dcef1a75257b50a2fbfe92a65187c47dab5a0f1b9b332c5919a3fb \
+    --hash=sha256:af5c59122a011049aad5dd87424b8e65a80e4a6477419c0c1015f73fb5ea0293 \
+    --hash=sha256:b18e0a9ef57d2b41f5c68beefa32317d286c3d6ac0484efd10d6e07491bb95dd \
+    --hash=sha256:b4e248d1087abf9f4c10f3c398896c87ce82a9856494a7155823eb45a892395d \
+    --hash=sha256:ba4e9e0ae13fc41c6b23299545e5ef73055213e466bd107953e4a013a5ddd7e3 \
+    --hash=sha256:c6332685306b6417a91b1ff9fae889b3ba65c2292d64bd9245c093b1b284809d \
+    --hash=sha256:d9efd8b7a3ef378dd61a1e77367f1924375befc2eba06168b6ebfa903a5e59ca \
+    --hash=sha256:df5169c4396adc04f9b0a05f13c074df878b6052430e03f50e68adf3a57aa28d \
+    --hash=sha256:ebb253464a5d0482b191274f1c8bf00e33f7e0b9c66405fbffc61ed2c839c775 \
+    --hash=sha256:ec80dc47f54e6e9a78181ce05feb71a0353854cc26999db963695f950b5fb375 \
+    --hash=sha256:f032b34669220030f905152045dfa27741ce1a6db3324a5bc0b96b6c7420c87b \
+    --hash=sha256:f60567825f791c6f8a592f3c6e3bd93dd2934e3f9dac189308426bd76b00ef3b \
+    --hash=sha256:f803eaa94c2fcda012c047e62bc7a51b0bdabda1cad7a92a522694ea2d76e49f \
+    # via pygit2
 docutils==0.16 \
     --hash=sha256:0c5b78adfbf7762415433f5515cd5c9e762339e23369dbe8000d84a4bf4ab3af \
     --hash=sha256:c2de3a60e9e7d07be26b7f2b00ca0309c207e06c100f9cc2a94931fc75a478fc \
@@ -35,6 +75,29 @@ keyring==21.4.0 \
     --hash=sha256:4e34ea2fdec90c1c43d6610b5a5fafa1b9097db1802948e90caf5763974b8f8d \
     --hash=sha256:9aeadd006a852b78f4b4ef7c7556c2774d2432bbef8ee538a3e9089ac8b11466 \
     # via -r contrib/packaging/requirements-windows.txt.in
+pycparser==2.20 \
+    --hash=sha256:2d475327684562c3a96cc71adf7dc8c4f0565175cf86b6d7a404ff4c771f15f0 \
+    --hash=sha256:7582ad22678f0fcd81102833f60ef8d0e57288b6b5fb00323d101be910e35705 \
+    # via cffi
+pygit2==1.4.0 ; python_version >= "3" \
+    --hash=sha256:0d298098e286eeda000e49ca7e1b41f87300e10dd8b9d06b32b008bd61f50b83 \
+    --hash=sha256:0ee135eb2cd8b07ce1374f3596cc5c3213472d6389bad6a4c5d87d8e267e93e9 \
+    --hash=sha256:32eb863d6651d4890ced318505ea8dc229bd9637deaf29c898de1ab574d727a0 \
+    --hash=sha256:37d6d7d6d7804c42a0fe23425c72e38093488525092fc5e51a05684e63503ce7 \
+    --hash=sha256:41204b6f3406d9f53147710f3cc485d77181ba67f57c34d36b7c86de1c14a18c \
+    --hash=sha256:818c91b582109d90580c5da74af783738838353f15eb12eeb734d80a974b05a3 \
+    --hash=sha256:8306a302487dac67df7af6a064bb37e8a8eb4138958f9560ff49ff162e185dab \
+    --hash=sha256:9c2f2d9ef59513007b66f6534b000792b614de3faf60313a0a68f6b8571aea85 \
+    --hash=sha256:9c8d5881eb709e2e2e13000b507a131bd5fb91a879581030088d0ddffbcd19af \
+    --hash=sha256:b422e417739def0a136a6355723dfe8a5ffc83db5098076f28a14f1d139779c1 \
+    --hash=sha256:cbeb38ab1df9b5d8896548a11e63aae8a064763ab5f1eabe4475e6b8a78ee1c8 \
+    --hash=sha256:cf00481ddf053e549a6edd0216bdc267b292d261eae02a67bb3737de920cbf88 \
+    --hash=sha256:d0d889144e9487d926fecea947c3f39ce5f477e521d7d467d2e66907e4cd657d \
+    --hash=sha256:ddb7a1f6d38063e8724abfa1cfdfb0f9b25014b8bca0546274b7a84b873a3888 \
+    --hash=sha256:e9037a7d810750fe23c9f5641ef14a0af2525ff03e14752cd4f73e1870ecfcb0 \
+    --hash=sha256:ec5c0365a9bdfcac1609d20868507b28685ec5ea7cc3a2c903c9b62ef2e0bbc0 \
+    --hash=sha256:fdd8ba30cda277290e000322f505132f590cf89bd7d31829b45a3cb57447ec32 \
+    # via -r contrib/packaging/requirements-windows.txt.in
 pygments==2.7.1 \
     --hash=sha256:307543fe65c0947b126e83dd5a61bd8acbd84abec11f43caebaf5534cbc17998 \
     --hash=sha256:926c3f319eda178d1bd90851e4317e6d8cdb5e292a3386aac9bd75eca29cf9c7 \
diff --git a/contrib/packaging/requirements-windows.txt.in b/contrib/packaging/requirements-windows.txt.in
--- a/contrib/packaging/requirements-windows.txt.in
+++ b/contrib/packaging/requirements-windows.txt.in
@@ -3,6 +3,7 @@ docutils
 dulwich < 0.20 ; python_version <= '2.7'
 dulwich ; python_version >= '3'
 keyring
+pygit2 ; python_version >= '3'
 pygments
 # Need to list explicitly so dependency gets pulled in when
 # not running on Windows.