Add s to the end of format string

Change-Id: I7dba1e9115cc266ca4baccde7a2c206aea0cadc7
diff --git a/jeepyb/cmd/manage_projects.py b/jeepyb/cmd/manage_projects.py
index 66d0ca6..853dde2 100644
--- a/jeepyb/cmd/manage_projects.py
+++ b/jeepyb/cmd/manage_projects.py
@@ -428,7 +428,7 @@
                     run_command("git init %s" % repo_path)
                     git_command(
                         repo_path,
-                        "remote add origin %(remote_url)" % git_opts)
+                        "remote add origin %(remote_url)s" % git_opts)
                     with open(os.path.join(repo_path,
                                            ".gitreview"),
                               'w') as gitreview: