git pull échoue 'error: refs / stash ne pointe pas vers un objet valide!'

git pull donne cette erreur:

$ git pull
error: refs/stash does not point to a valid object!
error: refs/stash does not point to a valid object!
error: refs/stash does not point to a valid object!
error: refs/stash does not point to a valid object!
Current branch mybranch is up to date.

J'ai essayé cette solution mais il ne fonctionne pas pour moi.
Mis à jour info:

$ GIT_TRACE=1 git pull 
trace: exec: 'git-pull'
trace: run_command: 'git-pull'
trace: built-in: git 'rev-parse' '--git-dir'
trace: built-in: git 'rev-parse' '--is-bare-repository'
trace: built-in: git 'rev-parse' '--show-toplevel'
trace: built-in: git 'ls-files' '-u'
trace: built-in: git 'symbolic-ref' '-q' 'HEAD'
trace: built-in: git 'config' '--bool' 'branch.mybranch.rebase'
trace: built-in: git 'rev-parse' '-q' '--verify' 'HEAD'
trace: built-in: git 'rev-parse' '--verify' 'HEAD'
trace: built-in: git 'update-index' '-q' '--ignore-submodules' '--refresh'
trace: built-in: git 'diff-files' '--quiet' '--ignore-submodules'
trace: built-in: git 'diff-index' '--cached' '--quiet' '--ignore-submodules' 'HEAD' '--'
trace: built-in: git 'rev-parse' '-q' '--git-dir'
trace: built-in: git 'rev-parse' '-q' '--verify' 'refs/remotes/origin/mybranch'
trace: built-in: git 'merge-base' '53512e9ce3faa7c78b6d5d7ba1a63e56b5a42a11' 'refs/heads/mybranch'
trace: built-in: git 'rev-parse' '-q' '--verify' 'HEAD'
trace: built-in: git 'fetch' '--update-head-ok'
error: refs/stash does not point to a valid object!
trace: run_command: 'ssh' 'git@git-master' 'git-upload-pack '\''function-test'\'''
error: refs/stash does not point to a valid object!
trace: run_command: 'rev-list' '--verify-objects' '--stdin' '--not' '--all' '--quiet'
trace: run_command: 'rev-list' '--verify-objects' '--stdin' '--not' '--all'
trace: exec: 'git' 'rev-list' '--verify-objects' '--stdin' '--not' '--all'
trace: built-in: git 'rev-list' '--verify-objects' '--stdin' '--not' '--all'
error: refs/stash does not point to a valid object!
error: refs/stash does not point to a valid object!
trace:...

source d'informationauteur Jaime M.