Spring Boot application fails to start due to git-upload-pack not permitted

Issue

Spring Boot application is failing to startup due to:

2018-09-26 15:19:23.395 ERROR 7 --- [           main] o.s.boot.SpringApplication               : Application startup failed
java.lang.IllegalStateException: Cannot clone or checkout repository
...
Caused by: org.eclipse.jgit.api.errors.TransportException: https://test@gitlab.example.org/mygroup/myrepo.git:  git-upload-pack not permitted
    at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:139)
    at org.eclipse.jgit.api.CloneCommand.fetch(CloneCommand.java:187)
        ...