use git.git repository.
git log --pretty=format:Commit:%H%nParent:%P%n%n --parents -- alloc.c
Commit:100c5f3b0b27ec6617de1a785c4ff481e92636c1 Parent:2c1cbec1e2f0bd7b15fe5e921d287babfd91c7d3
Commit:2c1cbec1e2f0bd7b15fe5e921d287babfd91c7d3 Parent:579d1fbfaf25550254014fa472faac95f88eb779
Commit:579d1fbfaf25550254014fa472faac95f88eb779 Parent:855419f764a65e92f1d5dd1b3d50ee987db1d9de
Commit:855419f764a65e92f1d5dd1b3d50ee987db1d9de Parent:
Parent will be rewritten correctly.
But When I add --follow, it will be git log --pretty=format:Commit:%H%nParent:%P%n%n --parents --follow -- alloc.c
Commit:100c5f3b0b27ec6617de1a785c4ff481e92636c1 Parent:2c1cbec1e2f0bd7b15fe5e921d287babfd91c7d3
Commit:2c1cbec1e2f0bd7b15fe5e921d287babfd91c7d3 Parent:f948792990f82a35bf0c98510e7511ef8acb9cd3
Commit:579d1fbfaf25550254014fa472faac95f88eb779 Parent:446c6faec69f7ac521b8b9fc2b1874731729032f
Commit:855419f764a65e92f1d5dd1b3d50ee987db1d9de Parent:64e86c57867593ba0ee77a7b0ff0eb8e9d4d8ed5
parent will be not rewritten.