$ git clone -n https://src.fedoraproject.org/rpms/linbox.git /var/lib/mock/f40-build-2295900-56348/root/chroot_tmpdir/scmroot/linbox
Cloning into '/var/lib/mock/f40-build-2295900-56348/root/chroot_tmpdir/scmroot/linbox'...
$ git fetch origin 89fa2482a16361bdf5b71ef4fe8ff1b6624f2dd3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/linbox
 * [new ref]         89fa2482a16361bdf5b71ef4fe8ff1b6624f2dd3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 89fa248 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild