$ git clone -n https://src.fedoraproject.org/rpms/php.git /var/lib/mock/f42-build-862651-170994/root/chroot_tmpdir/scmroot/php
Cloning into '/var/lib/mock/f42-build-862651-170994/root/chroot_tmpdir/scmroot/php'...
$ git fetch origin b8d66ecf37e8e63269c9684e7dbe785799c2b250:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php
 * [new ref]         b8d66ecf37e8e63269c9684e7dbe785799c2b250 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8d66ec Rebuild for ICU 76