$ git clone -n https://src.fedoraproject.org/rpms/rust-miette.git /var/lib/mock/f40-build-2287552-55744/root/chroot_tmpdir/scmroot/rust-miette
Cloning into '/var/lib/mock/f40-build-2287552-55744/root/chroot_tmpdir/scmroot/rust-miette'...
$ git fetch origin bb98beb35a5bc83590097d9267d211e5fa03b463:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-miette
 * [new ref]         bb98beb35a5bc83590097d9267d211e5fa03b463 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb98beb Regenerate with rust2rpm v25 and enable "fancy" feature