bin/bugzilla_mesa.sh: explicitly set the --pretty argument

Signed-off-by: Dylan Baker <dylan.c.baker@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Andres Gomez <agomez@igalia.com>

bin/bugzilla_mesa.sh

@@ -23,7 +23,7 @@ echo "<ul>"
 echo ""
 
 # extract fdo urls from commit log
-git log $* | grep 'bugs.freedesktop.org/show_bug' | sed -e $trim_before | sort -n -u | sed -e $use_after |\
+git log --pretty=medium $* | grep 'bugs.freedesktop.org/show_bug' | sed -e $trim_before | sort -n -u | sed -e $use_after |\
 while read url
 do
 	id=$(echo $url | cut -d'=' -f2)