$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_yes.git /var/lib/mock/f41-build-810503-146730/root/chroot_tmpdir/scmroot/rust-uu_yes
Cloning into '/var/lib/mock/f41-build-810503-146730/root/chroot_tmpdir/scmroot/rust-uu_yes'...
$ git fetch origin 8fc3ebf37718f470737aa04d8feb22a999b7bfdd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_yes
 * [new ref]         8fc3ebf37718f470737aa04d8feb22a999b7bfdd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8fc3ebf Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces