Crush while importing p4 repo using git p4

git p4 crush dump

fast-import crash report:
    fast-import process: 14492
    parent process     : 1
    at Tue Feb 22 15:03:46 2011

fatal: Invalid ref name or SHA1 expression: refs/remotes/p4/SomeTools/mainline/SomeTool

Most Recent Commands Before Crash
---------------------------------
  checkpoint
  commit refs/remotes/p4/SomeTools/users/username
  committer User (USER) <[email protected]> 1268945457 +0100
  data <<EOT
* from refs/remotes/p4/SomeTools/mainline/SomeTool

Active Branch LRU
-----------------
    active_branches = 0 cur, 5 max

  pos  clock name
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Inactive Branches
-----------------
refs/remotes/p4/SomeTools/users/username:
  status      : dirty
  tip commit  : 0000000000000000000000000000000000000000
  old tree    : 0000000000000000000000000000000000000000
  cur tree    : 0000000000000000000000000000000000000000
  commit clock: 0
  last pack   : 


Marks
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END OF CRASH REPORT