It's because of these lines:
if lfs_clone:
git_command = ['git', 'lfs', 'fetch', '--all', '--prune']
else:
git_command = ['git', 'fetch', '--all', '--force', '--tags', '--prune']
Which should instead be something like
git_command = ['git', 'fetch', '--all', '--force', '--tags', '--prune']
# TODO: execute the first git command
if lfs_clone:
git_command = ['git', 'lfs', 'fetch', '--all', '--prune']
# TODO: execute this second git command
It's because of these lines:
Which should instead be something like