$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-yac.git /var/lib/mock/f40-build-733832-105472/root/chroot_tmpdir/scmroot/php-pecl-yac
Cloning into '/var/lib/mock/f40-build-733832-105472/root/chroot_tmpdir/scmroot/php-pecl-yac'...
$ git fetch origin 1a622c662e6b0aa6b5d3178dd7101e9ca06a4323:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pecl-yac
 * [new ref]         1a622c662e6b0aa6b5d3178dd7101e9ca06a4323 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a622c6 rebuild for https://fedoraproject.org/wiki/Changes/php83