Sören Krecker [off-list ref] writes:

Replace SID with domain/username in error message, if owner of repository
and user are not equal on windows systems.

Old message:
'''
fatal: detected dubious ownership in repository at 'C:/Users/test/source/repos/git'
'C:/Users/test/source/repos/git' is owned by:
	'S-1-5-21-571067702-4104414259-3379520149-500'
but the current user is:
	'S-1-5-21-571067702-4104414259-3379520149-1001'
To add an exception for this directory, call:

	git config --global --add safe.directory C:/Users/test/source/repos/git
'''

New massage:

"massage"???

'''
fatal: detected dubious ownership in repository at 'C:/Users/test/source/repos/git'
'C:/Users/test/source/repos/git' is owned by:
        'DESKTOP-L78JVA6/Administrator'
but the current user is:
        'DESKTOP-L78JVA6/test'
To add an exception for this directory, call:

        git config --global --add safe.directory C:/Users/test/source/repos/git
'''

The same "does this lose information?" comment applies to this one
as well, as the fundamental approach is unchanged.

+static BOOL user_sid_to_user_name(PSID sid, LPSTR *str)
+{
+	SID_NAME_USE pe_use;
+	DWORD len_user = 0, len_domain = 0;
+	BOOL translate_sid_to_user;
+
+	/* returns only FALSE, because the string pointers are NULL*/
+	LookupAccountSidA(NULL, sid, NULL, &len_user, NULL, &len_domain,
+			  &pe_use); 
+	/*Alloc needed space of the strings*/
+	ALLOC_ARRAY((*str), (size_t)len_domain + (size_t)len_user); 
+	translate_sid_to_user = LookupAccountSidA(NULL, sid, (*str) + len_domain, &len_user,
+				   *str, &len_domain, &pe_use);
+	*(*str + len_domain) = '/';
+	if (translate_sid_to_user == FALSE) {
+		FREE_AND_NULL(*str);
+	}

Is this "FREE_AND_NULL" about clearing after you see an error?  If
so, shouldn't "overwrite the byte after the domain part with a slash"
be done only when you have no error, i.e., perhaps

	translate_sid_to_user = LookupAccountSidA(...);
	if (!translate_sid_to_user)
		FREE_AND_NULL(*str);
	else
        	(*str)[len_domain] = '/';

or something along the line?

+	return translate_sid_to_user;
+}