git alternates

matteo@turbo:/usr/src/linux$ du -sh .git
1,3G    .git
matteo@turbo:/usr/src/linux$ echo /home/matteo/src/linux/.git/objects >.git/objects/info/alternates
matteo@turbo:/usr/src/linux$ git gc
Counting objects: 21, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (19/19), done.
Writing objects: 100% (21/21), done.
Total 21 (delta 3), reused 8 (delta 2)
Checking connectivity: 6223212, done.
matteo@turbo:/usr/src/linux$ du -sh .git
6,7M    .git
matteo@turbo:/usr/src/linux$