[Koha] broken kohadevbox

[Radek Šiman]

Dear collegues,
please help me to fix my serious problem with kohadevbox. I was updating 
sources from master using "git pull", but my internet connection got 
broken. Now I cannot update anymore even if I reset the master with
git reset --hard origin/master

vagrant at kohadevbox:kohaclone(master)$ git pull
error: Unable to find 0dc1b622844f51da59bace572a04141733ba1f3a under 
http://git.koha-community.org/koha.git
Cannot obtain needed tree 0dc1b622844f51da59bace572a04141733ba1f3a
while processing commit 7636c68d769a1c2e62ced6aa9f2fbe12adf22c8d.
error: fetch failed.

How can I solve this?
Radek