Fix shallow clone missing commit.

Fix shallow clone missing commit.

Author: pz9115

Makefile.in

@@ -346,6 +346,7 @@ endif
 
 $(srcdir)/%/.git:
 	cd $(srcdir) && \
+ 	flock `git rev-parse --git-dir`/config git fetch --all && \
 	flock `git rev-parse --git-dir`/config git submodule init $(dir $@) && \
 	flock `git rev-parse --git-dir`/config git submodule update --progress --depth 1 $(dir $@)