$ git clone -n https://src.fedoraproject.org/rpms/php-netresearch-jsonmapper.git /var/lib/mock/f39-build-2341254-59733/root/chroot_tmpdir/scmroot/php-netresearch-jsonmapper
Cloning into '/var/lib/mock/f39-build-2341254-59733/root/chroot_tmpdir/scmroot/php-netresearch-jsonmapper'...
$ git fetch origin 9fd1eca511420f675133a0f2f7537910c3535b9d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-netresearch-jsonmapper
 * [new ref]         9fd1eca511420f675133a0f2f7537910c3535b9d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9fd1eca v4.4.0