$ git clone -n https://src.fedoraproject.org/rpms/php-ast.git /var/lib/mock/f40-build-2229990-53195/root/chroot_tmpdir/scmroot/php-ast
Cloning into '/var/lib/mock/f40-build-2229990-53195/root/chroot_tmpdir/scmroot/php-ast'...
$ git fetch origin 331318eec97f7d3465e57ecb5cc1960fbf195e3f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-ast
 * [new ref]         331318eec97f7d3465e57ecb5cc1960fbf195e3f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 331318e update to 1.1.1