'fatal: expected flush after ref listing' resulting in HTTP 500 error

I'm trying to clone a repository and cannot:

$ git clone https://salsa.debian.org/ci-team/autopkgtest.git
Cloning into 'autopkgtest'...
error: RPC failed; HTTP 500 curl 22 The requested URL returned error: 500
fatal: expected flush after ref listing

Although the webpage displays fine and is interactive: https://salsa.debian.org/ci-team/autopkgtest

In fact, I get this error when even trying to update any of my existing salsa repos.

Edited Feb 28, 2023 by Heather Ellsworth

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information