[Qgis-developer] Git help needed

[MORREALE Jean Roc]

Hi,

Could a git expert tell me how to clean my repo ?

The situation : my fork origin/master is synced with upstream/master but 
if I do a pull request, some old commits are taken into account even if 
they aren't relevant.

The desired solution : wipe all my local history and get a "pure" copy 
of upstream as if I just forked, without deleting my actual github fork.

Regards,

Jean-Roc