lib = library(
    identifier: "mylib@tag",
    retriever: modernSCM(
        [$class: 'GitSCMSource',
        remote: "GITLAB_URL/mylib.git",
        credentialsId: 'MY_SSH_KEY']
    )
)

Attempting to resolve branch_name from remote references...
 > git --version # timeout=10
using GIT_SSH to set credentials Cle SSH pour la connexion au gitlab
 > git ls-remote git@gitlab/mylib.git # timeout=10
Found match: refs/heads/branch_name revision 1dd58015a5a5b9cb4a44404871b81cce6e5e18bb
using credential MY_SSH_KEY
Cloning the remote Git repository
Cloning with configured refspecs honoured and without tags
Cloning repository git@gitlab/mylib.git
 > git init /jenkins/workspace@libs/mylib # timeout=10
Fetching upstream changes from git@gitlab/mylib.git
 > git --version # timeout=10
using GIT_SSH to set credentials Cle SSH pour la connexion au gitlab
 > git fetch --no-tags --progress git@gitlab/mylib.git +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url git@gitlab/mylib.git # timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url git@gitlab/mylib.git # timeout=10
Fetching without tags
Fetching upstream changes from git@gitlab/mylib.git
using GIT_SSH to set credentials Cle SSH pour la connexion au gitlab
 > git fetch --no-tags --progress git@gitlab/mylib.git +refs/heads/*:refs/remotes/origin/*
Checking out Revision 1dd58015a5a5b9cb4a44404871b81cce6e5e18bb (branch_name)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 1dd58015a5a5b9cb4a44404871b81cce6e5e18bb
Commit message: "message"
 > git rev-list --no-walk 1dd58015a5a5b9cb4a44404871b81cce6e5e18bb # timeout=10

Loading library mylib@tag
Attempting to resolve tag from remote references...
 > git --version # timeout=10
using GIT_SSH to set credentials Cle SSH pour la connexion au gitlab
 > git ls-remote git@gitlab/mylib.git.git # timeout=10
Found match: refs/tags/tag revision 1dd58015a5a5b9cb4a44404871b81cce6e5e18bb
Resolving tag commit... (remote references may be a lightweight tag or an annotated tag)
 > git rev-parse --is-inside-work-tree # timeout=10
Setting origin to git@gitlab/mylib.git.git
 > git config remote.origin.url git@gitlab/mylib.git.git # timeout=10
Fetching origin...
Fetching upstream changes from origin
 > git --version # timeout=10
 > git config --get remote.origin.url # timeout=10
 > git fetch --tags --progress origin +refs/heads/*:refs/remotes/origin/*
ERROR: Checkout failed
hudson.plugins.git.GitException: Command "git fetch --tags --progress origin +refs/heads/*:refs/remotes/origin/*" returned status code 128:
stdout: 
stderr: Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
fatal: Could not read from remote repository.