cannot install from gitlab-downloaded tarball

Hi devs, to install the latest master version on a cluster without outgoing internet access, I just found that I cannot do python setup.py install --user for this package from a download like https://git.ligo.org/lscsoft/bilby_pipe/-/archive/master/bilby_pipe-master.tar.gz since that doesn't contain the .git folder:

Running Python version 3.7.3
Confirmed Python version 3.5.0 or above
fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
Traceback (most recent call last):
  File "setup.py", line 74, in <module>
    version_file = write_version_file(VERSION)
  File "setup.py", line 36, in write_version_file
    ["git", "log", "-1", "--pretty=%h %ai"]
  File "/usr/lib/python3.7/subprocess.py", line 395, in check_output
    **kwargs).stdout
  File "/usr/lib/python3.7/subprocess.py", line 487, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['git', 'log', '-1', '--pretty=%h %ai']' returned non-zero exit status 128.

The workaround is of course to checkout the whole repo, make my own tarball of that and transfer to where I need it. However, the simpler gitlab-CI download link approach works fine for the main bilby package, so I hope it should be easy for you to similarly update the bilby_pipe setup with a fallback to work when .git is not present.