$ git init

$ dd if=/dev/urandom of=big-file-a bs=1M count=1

$ cp big-file-a big-file-b

$ ls -l
-rw-r--r-- 1 user group 1.0M 29. Apr 19:07 big-file-a
-rw-r--r-- 1 user group 1.0M 29. Apr 19:07 big-file-b

$ git add big-file-*

$ git commit -m test-commit

$ git log
commit 757dd408ab445b18be87f388180175f39a56cb1e
...

$ git cat-file -p 757dd
tree fa9bd01b5a3221f2ea972ce97ad82473868d6d86
...

$ git cat-file -p fa9bd
100644 blob ce178896ee0b8608c463beb41ca1110bc9545865    big-file-a
100644 blob ce178896ee0b8608c463beb41ca1110bc9545865    big-file-b

$ du -hs .git/objects/
1.1M    .git/objects/