$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-memcached.git /var/lib/mock/f42-build-862860-171186/root/chroot_tmpdir/scmroot/php-pecl-memcached
Cloning into '/var/lib/mock/f42-build-862860-171186/root/chroot_tmpdir/scmroot/php-pecl-memcached'...
$ git fetch origin 39f346d5d006cb04343f0f793093dc9907061adb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pecl-memcached
 * [new ref]         39f346d5d006cb04343f0f793093dc9907061adb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39f346d update to 3.3.0