$ git clone -n https://src.fedoraproject.org/rpms/cpio.git /var/lib/mock/f40-build-777663-129469/root/chroot_tmpdir/scmroot/cpio
Cloning into '/var/lib/mock/f40-build-777663-129469/root/chroot_tmpdir/scmroot/cpio'...
$ git fetch origin 461289dc7e6c59f61b534b354e9d2248e0a500cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cpio
 * [new ref]         461289dc7e6c59f61b534b354e9d2248e0a500cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 461289d Rebase to version 2.15