Question about purge git history

Hi

I have a git repository on server side, and a client keep pulling this repository periodically. After a while this repository gets very big (even after git gc), and since history is not very important to us, a purge strategy is needed.

I did some research on internet, and found two methods are available to purge history on git repository:

1. Remove .git folder
    1. Remove .git folder
    2. Reinit repository
    3. Commit all existing files
2.  Create a new branch and remove existing branch
    1. git checkout --orphan latest_branch
    2. git add -A
    3. git commit -am "commit message"
    4. git branch -D master
    5. git branch -m master
    6. git reflog expire --expire=now --all
    7. git gc --prune=now

Here I have two questions:
1. What would happen if client pulling is executed concurrently with above 2 methods? Would client side repository gets corrupted?
2. Is there anyway to propagate purged repository to client side?

Thank you so much for your attention.

Best Regards,
Kai