$ git clone -n https://src.fedoraproject.org/rpms/cronie.git /var/lib/mock/f40-build-2209069-52150/root/chroot_tmpdir/scmroot/cronie
Cloning into '/var/lib/mock/f40-build-2209069-52150/root/chroot_tmpdir/scmroot/cronie'...
$ git fetch origin c47c5cbbbe5b13025253c21798f28f20a4f41aa5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cronie
 * [new ref]         c47c5cbbbe5b13025253c21798f28f20a4f41aa5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c47c5cb Adds -n option: wait on finnishing grandchild process