$ git clone -n https://src.fedoraproject.org/rpms/weechat.git /var/lib/mock/f42-build-side-1-3589327-46957/root/chroot_tmpdir/scmroot/weechat
Cloning into '/var/lib/mock/f42-build-side-1-3589327-46957/root/chroot_tmpdir/scmroot/weechat'...
$ git fetch origin dd870bc9951b40bee308b5e5cc2a761c95577b81:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/weechat
 * [new ref]         dd870bc9951b40bee308b5e5cc2a761c95577b81 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd870bc Update to 4.6.3