Basically all you need is your repository url, username and password.
First is adding your git username and password on Jenkins credentials,

And after that, we can create a username and password credentials, and we give an id with the name of “devops”.

Use this jenkins script to execute git commands,
node('maven') {
stage('Clone') {
sh "git config --global http.sslVerify false"
git branch:"branch-01", url:"https://git.mygit.id/git/something/project.git", credentialsId:'devops'
}
}