$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-var-representation.git /var/lib/mock/f41-build-808578-145921/root/chroot_tmpdir/scmroot/php-pecl-var-representation
Cloning into '/var/lib/mock/f41-build-808578-145921/root/chroot_tmpdir/scmroot/php-pecl-var-representation'...
$ git fetch origin baa211866b27a368f7aa1a6fb85559d416722082:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pecl-var-representation
 * [new ref]         baa211866b27a368f7aa1a6fb85559d416722082 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at baa2118 drop 32-bit support