$ git clone -n https://src.fedoraproject.org/rpms/ursa-major.git /var/lib/mock/f42-bootstrap-3462983-45594/root/chroot_tmpdir/scmroot/ursa-major
Cloning into '/var/lib/mock/f42-bootstrap-3462983-45594/root/chroot_tmpdir/scmroot/ursa-major'...
$ git fetch origin 8e40131197730e83bb28e820e2828ebf844c22e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ursa-major
 * [new ref]         8e40131197730e83bb28e820e2828ebf844c22e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e40131 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild