$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_wc.git /var/lib/mock/f41-build-810751-146929/root/chroot_tmpdir/scmroot/rust-uu_wc
Cloning into '/var/lib/mock/f41-build-810751-146929/root/chroot_tmpdir/scmroot/rust-uu_wc'...
$ git fetch origin 4a5266a883fa6675eaade36b95ce548ed546ad5c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_wc
 * [new ref]         4a5266a883fa6675eaade36b95ce548ed546ad5c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a5266a Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces