$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-json-post.git /var/lib/mock/f45-build-28138-628/root/chroot_tmpdir/scmroot/php-pecl-json-post
Cloning into '/var/lib/mock/f45-build-28138-628/root/chroot_tmpdir/scmroot/php-pecl-json-post'...
$ git fetch origin a3424a665aff81b65ac063e61d546482e008631c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pecl-json-post
 * [new ref]         a3424a665aff81b65ac063e61d546482e008631c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3424a6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild