$ git clone -n https://src.fedoraproject.org/rpms/brewtarget.git /var/lib/mock/f40-build-2274790-55029/root/chroot_tmpdir/scmroot/brewtarget
Cloning into '/var/lib/mock/f40-build-2274790-55029/root/chroot_tmpdir/scmroot/brewtarget'...
$ git fetch origin 94b20a8097f9a1d8dfe13ce378a32a2733983278:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/brewtarget
 * [new ref]         94b20a8097f9a1d8dfe13ce378a32a2733983278 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94b20a8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild