$ git clone -n https://src.fedoraproject.org/rpms/unrar-free.git /var/lib/mock/f40-build-804481-144539/root/chroot_tmpdir/scmroot/unrar-free
Cloning into '/var/lib/mock/f40-build-804481-144539/root/chroot_tmpdir/scmroot/unrar-free'...
$ git fetch origin 8b9f5bba04964516d689152469a47ae41e4d9501:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unrar-free
 * [new ref]         8b9f5bba04964516d689152469a47ae41e4d9501 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b9f5bb Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild