$ git clone -n https://src.fedoraproject.org/rpms/pdfbox.git /var/lib/mock/f40-build-2105434-50579/root/chroot_tmpdir/scmroot/pdfbox
Cloning into '/var/lib/mock/f40-build-2105434-50579/root/chroot_tmpdir/scmroot/pdfbox'...
$ git fetch origin 979a77a0c60e2fd257d94ef9360f2658e6c9410a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pdfbox
 * [new ref]         979a77a0c60e2fd257d94ef9360f2658e6c9410a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 979a77a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild