$ git clone -n https://src.fedoraproject.org/rpms/jcuber.git /var/lib/mock/f42-build-3278437-41332/root/chroot_tmpdir/scmroot/jcuber
Cloning into '/var/lib/mock/f42-build-3278437-41332/root/chroot_tmpdir/scmroot/jcuber'...
$ git fetch origin 8fbea881b269c17c7796db512562cda91103472f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jcuber
 * [new ref]         8fbea881b269c17c7796db512562cda91103472f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8fbea88 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild