$ git clone -n https://src.fedoraproject.org/rpms/rust-rav1e.git /var/lib/mock/f40-build-1859149-24994/root/chroot_tmpdir/scmroot/rust-rav1e
Cloning into '/var/lib/mock/f40-build-1859149-24994/root/chroot_tmpdir/scmroot/rust-rav1e'...
$ git fetch origin 486468ce4def4438002269310177023ae56790ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rav1e
 * [new ref]         486468ce4def4438002269310177023ae56790ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 486468c Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces