$ git clone -n https://src.fedoraproject.org/rpms/rust-zstd-sys.git /var/lib/mock/f45-build-46417-834/root/chroot_tmpdir/scmroot/rust-zstd-sys
Cloning into '/var/lib/mock/f45-build-46417-834/root/chroot_tmpdir/scmroot/rust-zstd-sys'...
$ git fetch origin 02d062071dee2645de61f59474180127474e667a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zstd-sys
 * [new ref]         02d062071dee2645de61f59474180127474e667a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02d0620 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild