$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-xattr.git /var/lib/mock/f40-build-2213071-52311/root/chroot_tmpdir/scmroot/php-pecl-xattr
Cloning into '/var/lib/mock/f40-build-2213071-52311/root/chroot_tmpdir/scmroot/php-pecl-xattr'...
$ git fetch origin 75b0c8edfaaf4b1a4082ccdfb58bda36c038acac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pecl-xattr
 * [new ref]         75b0c8edfaaf4b1a4082ccdfb58bda36c038acac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 75b0c8e rebuild for https://fedoraproject.org/wiki/Changes/php83