$ git clone -n https://src.fedoraproject.org/rpms/rust-primal-slowsieve.git /var/lib/mock/f40-build-2660321-66918/root/chroot_tmpdir/scmroot/rust-primal-slowsieve
Cloning into '/var/lib/mock/f40-build-2660321-66918/root/chroot_tmpdir/scmroot/rust-primal-slowsieve'...
$ git fetch origin 36cdd2decd4bb1f4ff619a20d17e5b9098abe39c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-primal-slowsieve
 * [new ref]         36cdd2decd4bb1f4ff619a20d17e5b9098abe39c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36cdd2d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild