Bup is a backup software that use git for the storage. Bup import chunks of file to deduplicate large files.
tosh-r630:~/backup$cat /dev/mapper/virtualmachines-sarge | bup split -n virtualmachines-sarges
bloom: adding 1 file (10967 objects).
tosh-r630:~/backup$bup join virtualmachines-sarges > /tmp/sarges.img
tosh-r630:~/backup$file /tmp/sarges.img
/tmp/sarges.img: x86 boot sector; GRand Unified Bootloader, stage1 version 0×3, stage2 address 0×2000, stage2 segment 0×200, GRUB version 0.94; partition 1: ID=0×83, active, starthead 1, startsector 63, 9976302 sectors; partition 2: ID=0×5, starthead 0, startsector 9976365, 498015 sectors, code offset 0×48
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