$ git clone -n https://src.fedoraproject.org/rpms/rust-primal-slowsieve.git /var/lib/mock/f38-build-side-43-rust-devel-1413280-31444/root/chroot_tmpdir/scmroot/rust-primal-slowsieve
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1413280-31444/root/chroot_tmpdir/scmroot/rust-primal-slowsieve'...
$ git fetch origin 3be83af23ce667f24ad11ffbfba82524f22eace0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-primal-slowsieve
 * [new ref]         3be83af23ce667f24ad11ffbfba82524f22eace0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3be83af Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild