$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_base32.git /var/lib/mock/f40-build-703998-12986/root/chroot_tmpdir/scmroot/rust-uu_base32
Cloning into '/var/lib/mock/f40-build-703998-12986/root/chroot_tmpdir/scmroot/rust-uu_base32'...
$ git fetch origin 1f439974958a06995ff88d0b67bdf3b0b25d9896:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_base32
 * [new ref]         1f439974958a06995ff88d0b67bdf3b0b25d9896 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f43997 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces