Hi,

I have the current 'master' branch of git installed and get
the following error when fetching a submodule that is not
checked out.

I've bisected this error down to commit
1b7ac4e6d4 (submodules: fix of regression on fetching of
non-init subsub-repo, 2020-11-12)

$ git version
git version 2.29.2.435.g72ffeb997e

$ git config --get submodule.recurse
true

$ git submodule status
-855827c583bc30645ba427885caa40c5b81764d2 sha1collisiondetection

$ git fetch
Fetching submodule sha1collisiondetection
Fetching submodule sha1collisiondetection/sha1collisiondetection
Fetching submodule
sha1collisiondetection/sha1collisiondetection/sha1collisiondetection
Fetching submodule
sha1collisiondetection/sha1collisiondetection/sha1collisiondetection/sha1collisiondetection
...

$ git submodule update --checkout
Submodule path 'sha1collisiondetection': checked out
'855827c583bc30645ba427885caa40c5b81764d2'

$ git fetch
Fetching submodule sha1collisiondetection
$

Ralf