Git submodules #6
Description
If a branch introduces a git submodule, then merging will fail. Presumably, because the program doesn't have access to the submodule's repository. This lack of access will be much more likely the case if the repository of the submodule is a private one.
Where b5677c9970d628790993460a681e8239bf133d3f is the submodule's HEAD commit, the program will produce this error:
org.eclipse.jgit.errors.MissingObjectException: Missing unknown b5677c9970d628790993460a681e8239bf133d3f
Support for git submodules needs to be provided, and/or give a better error message when a git submodule is detected.