$ git clone -n https://src.fedoraproject.org/rpms/httpd.git /var/lib/mock/f42-build-61010626-6587654/root/chroot_tmpdir/scmroot/httpd
Cloning into '/var/lib/mock/f42-build-61010626-6587654/root/chroot_tmpdir/scmroot/httpd'...
$ git fetch origin 1f087eb8b1e670cc371e8ca639aa98de477311e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/httpd
 * [new ref]         1f087eb8b1e670cc371e8ca639aa98de477311e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f087eb Remove obsolete patch