> committing a commit hash from a foreign repository in a text file (.gitmodules) No, that file is just for submodule URL, path, branch and options. The submo

> committing a commit hash from a foreign repository in a text file (.gitmodules) No, that file is just for submodule URL, path, branch and options. The submodule's target commit hash is stored in the superproject's ".git/modules/[path here]/HEAD".