no space left on device when push operate.

when I push my code to remote repository, get error message:"
git -c diff.mnemonicprefix=false -c core.quotepath=false push -v --tags origin master:master
POST git-receive-pack (13919 bytes)

remote: error: unable to create temporary file: No space left on device
remote: fatal: failed to write object

error: unpack failed: unpack-objects abnormal exit"

what's wrong with it?