$ git clone -n https://src.fedoraproject.org/rpms/php-ast.git /var/lib/mock/f41-build-side-1-2795221-32718/root/chroot_tmpdir/scmroot/php-ast
Cloning into '/var/lib/mock/f41-build-side-1-2795221-32718/root/chroot_tmpdir/scmroot/php-ast'...
$ git fetch origin cee8d2e6fd0f8ff64a0fb6fe3c1864393231a915:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-ast
 * [new ref]         cee8d2e6fd0f8ff64a0fb6fe3c1864393231a915 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cee8d2e bump version