$ git clone -n https://src.fedoraproject.org/rpms/coccinelle.git /var/lib/mock/f40-build-2208999-52150/root/chroot_tmpdir/scmroot/coccinelle
Cloning into '/var/lib/mock/f40-build-2208999-52150/root/chroot_tmpdir/scmroot/coccinelle'...
$ git fetch origin a8518e9f7930346ba6d4e9acc349977332d16893:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/coccinelle
 * [new ref]         a8518e9f7930346ba6d4e9acc349977332d16893 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a8518e9 Rebuild for ocaml-num