$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_ref.git /var/lib/mock/f38-build-side-42-init-devel-1134679-30353/root/chroot_tmpdir/scmroot/rust-sval_ref
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1134679-30353/root/chroot_tmpdir/scmroot/rust-sval_ref'...
$ git fetch origin da96babaebe2c5d81fe72f7bdbdf5f761223925b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_ref
 * [new ref]         da96babaebe2c5d81fe72f7bdbdf5f761223925b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da96bab Initial import (#2217032)