can't build a recipe based on git repo

First, thanks for the git-git import new feature :)

"# git-build-recipe format 0.4 deb-version {debupstream}-0~{revtime}
lp:~costamagnagianfranco/boinc/+git/trunk master"

this is the recipe:
https://code.launchpad.net/~costamagnagianfranco/+recipe/boinc-daily
code:
https://code.launchpad.net/~costamagnagianfranco/boinc/+git/trunk

traceback
lp:~costamagnagianfranco/boinc/+git/trunk master

RUN ['git-build-recipe', '--safe', '--no-build', '--manifest', '/home/buildd/build-RECIPEBRANCHBUILD-1260467/chroot-autobuild/home/buildd/work/tree/manifest', '--distribution', 'zesty', '--allow-fallback-to-native', '--append-version', '~ubuntu17.04.1', '/home/buildd/build-RECIPEBRANCHBUILD-1260467/chroot-autobuild/home/buildd/work/recipe', '/home/buildd/build-RECIPEBRANCHBUILD-1260467/chroot-autobuild/home/buildd/work/tree']
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/gitbuildrecipe/recipe.py", line 304, in pull_or_clone
    fetch_branches(base_branch)
  File "/usr/lib/python3/dist-packages/gitbuildrecipe/recipe.py", line 332, in fetch_branches
    "refs/heads/*:refs/remotes/%s/*" % child_branch.remote_name)
  File "/usr/lib/python3/dist-packages/gitbuildrecipe/recipe.py", line 637, in git_call
    **kwargs)
  File "/usr/lib/python3.5/subprocess.py", line 626, in check_output
    **kwargs).stdout
  File "/usr/lib/python3.5/subprocess.py", line 708, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['git', '-C', '/home/buildd/build-RECIPEBRANCHBUILD-1260467/chroot-autobuild/home/buildd/work/tree/recipe', 'fetch', 'lp:~costamagnagianfranco/boinc/+git/trunk', 'HEAD:refs/remotes/source/HEAD', 'refs/heads/*:refs/remotes/source/*']' returned non-zero exit status 128

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/git-build-recipe", line 9, in <module>
    load_entry_point('git-build-recipe==0.1', 'console_scripts', 'git-build-recipe')()
  File "/usr/lib/python3/dist-packages/gitbuildrecipe/main.py", line 110, in main
    build_tree(base_branch, working_directory)
  File "/usr/lib/python3/dist-packages/gitbuildrecipe/recipe.py", line 464, in build_tree
    _build_inner_tree(base_branch, target_path)
  File "/usr/lib/python3/dist-packages/gitbuildrecipe/recipe.py", line 385, in _build_inner_tree
    pull_or_clone(base_branch, target_path)
  File "/usr/lib/python3/dist-packages/gitbuildrecipe/recipe.py", line 306, in pull_or_clone
    raise FetchFailed(e.output)
gitbuildrecipe.recipe.FetchFailed: git fetch failed:
fatal: Couldn't find remote ref HEAD

resource.struct_rusage(ru_utime=0.3, ru_stime=0.048, ru_maxrss=26968, ru_ixrss=0, ru_idrss=0, ru_isrss=0, ru_minflt=8457, ru_majflt=20, ru_nswap=0, ru_inblock=4208, ru_oublock=184, ru_msgsnd=0, ru_msgrcv=0, ru_nsignals=0, ru_nvcsw=111, ru_nivcsw=6)
RUN: /usr/share/launchpad-buildd/slavebin/scan-for-processes ['scan-for-processes', 'RECIPEBRANCHBUILD-1260467']
Scanning for processes to kill in build /home/buildd/build-RECIPEBRANCHBUILD-1260467/chroot-autobuild...
RUN: /usr/share/launchpad-buildd/slavebin/umount-chroot ['umount-chroot', 'RECIPEBRANCHBUILD-1260467']
Unmounting chroot for build RECIPEBRANCHBUILD-1260467...
RUN: /usr/share/launchpad-buildd/slavebin/remove-build ['remove-build', 'RECIPEBRANCHBUILD-1260467']
Removing build RECIPEBRANCHBUILD-1260467

thanks