$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_fold.git /var/lib/mock/f41-build-810485-146722/root/chroot_tmpdir/scmroot/rust-uu_fold
Cloning into '/var/lib/mock/f41-build-810485-146722/root/chroot_tmpdir/scmroot/rust-uu_fold'...
$ git fetch origin 78bb6ee84dfbbe14e499e1fdb740329b704084e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_fold
 * [new ref]         78bb6ee84dfbbe14e499e1fdb740329b704084e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78bb6ee Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces