$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_cp.git /var/lib/mock/f41-build-810918-146983/root/chroot_tmpdir/scmroot/rust-uu_cp
Cloning into '/var/lib/mock/f41-build-810918-146983/root/chroot_tmpdir/scmroot/rust-uu_cp'...
$ git fetch origin c725391620f3ea98aa4df824b24458f2e2eae629:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_cp
 * [new ref]         c725391620f3ea98aa4df824b24458f2e2eae629 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c725391 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces