git-branches-rename: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/git-branches-rename - from package: git-tools

You may install the required package with command yum install {package}

Error in other languages:
git-branches-rename: bevel nie gevind nie
git-branches-rename: comandă negăsită
git-branches-rename: comando não encontrado
git-branches-rename: commande introuvable
git-branches-rename: command not found
git-branches-rename: käsku ei ole
git-branches-rename: không tìm thấy lệnh
git-branches-rename: komanda nerasta
git-branches-rename: Kommando nicht gefunden.
git-branches-rename: kommandot finns inte
git-branches-rename: komut yok
git-branches-rename: nie znaleziono polecenia
git-branches-rename: níor aimsíodh an t-ordú
git-branches-rename: no se encontró la orden
git-branches-rename: no s'ha trobat l'ordre
git-branches-rename: opdracht niet gevonden
git-branches-rename: parancs nem található
git-branches-rename: perintah tidak ditemukan
git-branches-rename: príkaz nenájdený
git-branches-rename: příkaz nenalezen
git-branches-rename: команда не найдена
git-branches-rename: командата не е открита
git-branches-rename: 命令找不到
git-branches-rename: コマンドが見つかりません