$ git clone -n https://src.fedoraproject.org/rpms/mathex.git /var/lib/mock/f40-build-2297056-56436/root/chroot_tmpdir/scmroot/mathex
Cloning into '/var/lib/mock/f40-build-2297056-56436/root/chroot_tmpdir/scmroot/mathex'...
$ git fetch origin 4b70d07272fc777a977044db77becbeaa4f2b5d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mathex
 * [new ref]         4b70d07272fc777a977044db77becbeaa4f2b5d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b70d07 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild