jhbuild, behind proxy compiling gnome-todo

Hi,

I'm new to gnome build system and trying to build gnome-todo. jhbuild
is unable to properly download the sources because of proxy issues.

My config is at https://paste.gnome.org/pzshlb6fp

adding repo entry for gnome git (through https) is working fine, while
freedesktop and gnu is failing. After setting this config, jhbuild is
still trying to access git:// rather than http://

Error log:

*** Checking out m4-common *** [9/48]
git remote set-url origin https://git.gnome.org/browse/m4-common
git remote update origin
Fetching origin
git rebase origin/master
Current branch master is up to date.
git submodule init
git submodule update
Cloning into 'autoconf-archive'...
fatal: unable to connect to git.sv.gnu.org:
git.sv.gnu.org[0: 208.118.235.72]: errno=Connection timed out

Clone of 'git://git.sv.gnu.org/autoconf-archive.git' into submodule
path 'autoconf-archive' failed
*** Error during phase checkout of m4-common: ########## Error running
git submodule update *** [9/48]

Please provide some pointers.

-- 

Thanks and Regards,
Aurabindo J