Hi, I just got a report with the following output after a "git fetch" operation using Git 2.11.0.windows.3 [1]: remote: Counting objects: 5922, done. remote: Compressing objects: 100% (14/14), done. error: inflate: data stream error (unknown compression method) error: unable to unpack 6acd8f279a8b20311665f41134579b7380970446 header fatal: SHA1 COLLISION FOUND WITH 6acd8f279a8b20311665f41134579b7380970446 ! fatal: index-pack failed I would be really surprised if we discovered a SHA1 collision in a production repo. My guess is that this is somehow triggered by a network issue (see data stream error). Any tips how to debug this? Thanks, Lars [1] Git for Windows build based on Git v2.11.0