$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-yac.git /var/lib/mock/f33-build-212569-48409/root/chroot_tmpdir/scmroot/php-pecl-yac
Cloning into '/var/lib/mock/f33-build-212569-48409/root/chroot_tmpdir/scmroot/php-pecl-yac'...
$ git reset --hard 3924a71b617b7624166cf4734e69a9d1cf1931ce
HEAD is now at 3924a71 missing BR