$ git clone -n https://src.fedoraproject.org/rpms/rust-winnow0.4.git /var/lib/mock/f40-build-2367892-60387/root/chroot_tmpdir/scmroot/rust-winnow0.4
Cloning into '/var/lib/mock/f40-build-2367892-60387/root/chroot_tmpdir/scmroot/rust-winnow0.4'...
$ git fetch origin 9fa725d3c13bfd538f6b328a3cfe3ca47ca224ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-winnow0.4
 * [new ref]         9fa725d3c13bfd538f6b328a3cfe3ca47ca224ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9fa725d compat package no longer needed