Reconfigure gitlab-ci

Signed-off-by: Marco Marinello <me@marcomarinello.it>
3 jobs for buster in 5 minutes and 35 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Clonezilla
passed #97
rebuild-squashfs

00:05:28

 
  Packaging
failed #101
build-buster

00:00:06

canceled #98
build-buster

00:01:37

 
Name Stage Failure
failed
build-buster Packaging
Running on runner-fv26W_P_-project-13-concurrent-0 via 1a3f2e30589a...
Fetching changes with git depth set to 1...
Reinitialized existing Git repository in /builds/fuss/fucc/.git/
warning: redirecting to https://gitlab.fuss.bz.it/fuss/fucc.git/
From http://gitlab.fuss.bz.it/fuss/fucc
+ 1a9eb5d...60193b2 buster -> origin/buster (forced update)
Checking out f821b5fd as buster...
fatal: reference is not a tree: f821b5fd2659fc6ed175b75f9e02313fc4d50dd0
ERROR: Job failed: exit code 1