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/etc/yum.repos.d/CentOS-Base.repo

http://mirrorlist.centos.org

http://vault.centos.org

https://vault.centos.org/6.10/%2A/x86_64/repodata/repomd.xml: [Errno 14] problem making ssl connection

http://ftp.riken.jp/Linux/centos-vault/
http://ftp.jaist.ac.jp/pub/Linux/CentOS-vault/
http://ftp.iij.ad.jp/pub/linux/centos-vault/

$ sudo diff /etc/yum.repos.d/CentOS-Base.repo.org /etc/yum.repos.d/CentOS-Base.repo

15,16c15
< mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra
< #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
---
> baseurl=http://ftp.riken.jp/Linux/centos-vault/6.10/os/$basearch/
23,24c22
< mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra
< #baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
---
> baseurl=http://ftp.riken.jp/Linux/centos-vault/6.10/updates/$basearch/
31,32c29
< mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
< #baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
---
> baseurl=http://ftp.riken.jp/Linux/centos-vault/6.10/extras/$basearch/
39,40c36
< mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus&infra=$infra
< #baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
---
> baseurl=http://ftp.riken.jp/Linux/centos-vault/6.10/centosplus/$basearch/
48,49c44
< mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib&infra=$infra
< #baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/
---
> baseurl=http://ftp.riken.jp/Linux/centos-vault/6.10/contrib/$basearch/

　本題の Git2～ インストール。IUS(Inline with Upstream Stable)リポジトリから CentOS6が無くなり、現時点で可能なのは"wandisco-git"リポジトリ。

$ sudo yum install http://opensource.wandisco.com/centos/6/git/x86_64/wandisco-git-release-6-1.noarch.rpm

で

/etc/yum.repos.d/wandisco-git.repo

が登録され

$ sudo yum install git

で git version 2.31.1 をインストール可能。ちなみに CentOS6～のリポジトリを解決せず"wandisco-git"リポジトリだけではPerl関連の依存エラー。