问题原因

本地在处理合并到master，处理的过程中远程已经有很多个分支合入了master，再提交，就会报这个错误 error: remote unpack failed: error Missing tree.

admin@localhost repo % git push origin HEAD:refs/for/master
Enumerating objects: 591, done.
Counting objects: 100% (392/392), done.
Delta compression using up to 12 threads
Compressing objects: 100% (111/111), done.
Writing objects: 100% (155/155), 31.08 KiB | 5.18 MiB/s, done.
Total 155 (delta 104), reused 64 (delta 41)
remote: Resolving deltas: 100% (104/104)
remote: Counting objects: 18774, done
fatal: Unpack error, check server log
error: remote unpack failed: error Missing tree xb79caff350580bd7d05d39345164cccd3f3b8fv
To ssh://10.20.16.25:28000/repo1
 ! [remote rejected]     HEAD -> refs/for/master (n/a (unpacker error))
error: failed to push some refs to 'ssh://username@10.20.16.25:28000/repo1'

结局办法

提交的时候，加入一个参数 --no-thin

git push --no-thin origin HEAD:refs/for/master