Bash script for sending passphrase to unlock OpenPGP secret key

Ubuntu 22.04.1 LTS When I do a git push REMOTE after a reboot, after a few seconds it comes up with a dialog box:

+---------------------------------------------------------------+
| Please enter the passphrase to unlock the OpenPGP secret key: |
| "user"                                                        |
| 3072-bit RSA key, ID FF3B0094D97228,                          |
| created 2023-09-22 (main key ID 9BD967C9E4EC49).              |
|                                                               |
|                                                               |
| Passphrase: _________________________________________________ |
|                                                               |
|                                                   |
+---------------------------------------------------------------+

How can I automate entering this passphrase via a script so I do not have to do it manually? I tried this which does not work:

git push REMOTE 
sleep 10  # Waits 10 seconds.
KEY

Thanks!