history missing

[Vitaliy Semochkin <vitaliy.se@gmail.com>]

Hi,

I cloned a remote repository
to check recent changes in origin/master I do:
git fetch origin master
git log origin master

recently I found out that log doesn't show recent commits
I know that on server there were several commits let's say on the 19th
but log shows that recent commit was done on the 17th
the most strange thing I'm sure I have seen those commits fetched already
I did git fetch origin master several times but it didn't help
the log says that recent commit was done on 17th
after I performed git remote update
log again shows recent commits on 19th
Has anyone faced such behaviour?
I'm relatively new git user, what do I do wrong?

Thanks in advance,
Vitaliy S