$ git clone -n https://src.fedoraproject.org/rpms/rust-rayon-core /var/lib/mock/f42-build-3453411-45488/root/chroot_tmpdir/scmroot/rust-rayon-core
Cloning into '/var/lib/mock/f42-build-3453411-45488/root/chroot_tmpdir/scmroot/rust-rayon-core'...
$ git fetch origin 46c0403d8632c808e4d6567da664e4fc03f95a2c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rayon-core
 * [new ref]         46c0403d8632c808e4d6567da664e4fc03f95a2c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 46c0403 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild