$ git clone -n https://src.fedoraproject.org/rpms/rust-rav1e /var/lib/mock/f42-build-3453403-45488/root/chroot_tmpdir/scmroot/rust-rav1e
Cloning into '/var/lib/mock/f42-build-3453403-45488/root/chroot_tmpdir/scmroot/rust-rav1e'...
$ git fetch origin 8c8f51802c5d2281fb8c5fbb5b02ee915ea8c39c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rav1e
 * [new ref]         8c8f51802c5d2281fb8c5fbb5b02ee915ea8c39c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c8f518 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild