$ git clone -n https://src.fedoraproject.org/rpms/php.git /var/lib/mock/f40-build-733770-105409/root/chroot_tmpdir/scmroot/php
Cloning into '/var/lib/mock/f40-build-733770-105409/root/chroot_tmpdir/scmroot/php'...
$ git fetch origin ed7d9c8a5bed2245954c38a4ffad906c39762d4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php
 * [new ref]         ed7d9c8a5bed2245954c38a4ffad906c39762d4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed7d9c8 v8.3.0RC5