Can't add repo in patchrom erno=Connection timed out in Linux Mint

[johnelmermin227]

Hi i'd like to build my own device when i'm trying to add repo for patchrom marshmallow but it's been so long and i faced this:

oem@john-MS-7721:~/patchrom$ repo init -u git://github.com/MiCode/patchrom.git -b marshmallow
Downloading Repo source from https://gerrit.googlesource.com/git-repo
repo: Updating release signing keys to keyset ver 2.3

... A new version of repo (2.21) is available.
... New version is available at: /home/oem/patchrom/.repo/repo/repo
... The launcher is run from: /usr/bin/repo
!!! The launcher is not writable. Please talk to your sysadmin or distro
!!! to get an update installed.

manifests:
fatal: unable to connect to github.com:
github.com[0: 20.205.243.166]: errno=Connection timed out

manifests: sleeping 4.0 seconds before retrying

Like this i really need build patchrom for my old device!!!