$ git clone -n https://src.fedoraproject.org/rpms/mathjax.git /var/lib/mock/f40-build-2297059-56436/root/chroot_tmpdir/scmroot/mathjax
Cloning into '/var/lib/mock/f40-build-2297059-56436/root/chroot_tmpdir/scmroot/mathjax'...
$ git fetch origin 53788d81b2c35ce4ebb2d56b2155beeaea80ec35:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mathjax
 * [new ref]         53788d81b2c35ce4ebb2d56b2155beeaea80ec35 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53788d8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild