Your college proxy might have some authentication. Put the correct proxy settings in the environment by adding this
export http_proxy="http://[username]:[password]@[proxy.server.com]:[port]"
export https_proxy="http://[username]:[password]@[proxy.server.com]:[port]"
in your .bashrc or any other init configuration files. Even if this shows the same error, I came across a good proGY tool (intermediate proxy authenticator). You will also need to set the proxy server url as above, in git config as well
git config --global http.proxy http:
git config --global https.proxy http:
, git , jhbuild URL- http://git git://clone URLS.
repos['git.gnome.org'] = 'https://git.gnome.org/browse/'
repos['git.freedesktop.org'] = 'http://anongit.freedesktop.org/git/'
repos['wayland.freedesktop.org'] = 'http://anongit.freedesktop.org/git/wayland'
repos['gstreamer.freedesktop.org'] = 'http://anongit.freedesktop.org/git/gstreamer'
repos['pulseaudio.freedesktop.org'] = 'http://anongit.freedesktop.org/git/pulseaudio'
repos['telepathy.freedesktop.org'] = 'http://anongit.freedesktop.org/git/telepathy'
repos['modemmanager.freedesktop.org'] = 'http://anongit.freedesktop.org/git/ModemManager'
repos['git.savannah.nongnu.org'] = 'http://git.savannah.gnu.org/r/'
repos['github.com'] = 'https://github.com/'
jhbuildrc ( ~/.config/jhbuildrc)