$ git clone -n https://src.fedoraproject.org/rpms/erlang-kvc.git /var/lib/mock/f41-build-727209-13125/root/chroot_tmpdir/scmroot/erlang-kvc
Cloning into '/var/lib/mock/f41-build-727209-13125/root/chroot_tmpdir/scmroot/erlang-kvc'...
$ git fetch origin da272c32b809bda0356bb1415b6a3721898e4d01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-kvc
 * [new ref]         da272c32b809bda0356bb1415b6a3721898e4d01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da272c3 Spec-file cleanup