jgit: 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 Debian possible default full paths are:

/usr/bin/jgit - from package: jgit-cli

You may install the required package with command apt-get install {package}

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