$ git clone -n https://src.fedoraproject.org/rpms/maxima.git /var/lib/mock/f38-build-side-42-init-devel-980605-29031/root/chroot_tmpdir/scmroot/maxima
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-980605-29031/root/chroot_tmpdir/scmroot/maxima'...
$ git fetch origin f42d670a45d4d0cd2fe51104e4690780a9880315:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maxima
 * [new ref]         f42d670a45d4d0cd2fe51104e4690780a9880315 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f42d670 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild