/usr/include/ibdm/git_version.h is in libibdm-dev 1.5.7-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#define IBDM_CODE_VERSION "6c2cf8f43ea0850ce510a34698b629c2c5b721d8"