$ git clone -n https://src.fedoraproject.org/rpms/weechat.git /var/lib/mock/f41-build-921243-17111/root/chroot_tmpdir/scmroot/weechat
Cloning into '/var/lib/mock/f41-build-921243-17111/root/chroot_tmpdir/scmroot/weechat'...
$ git fetch origin 635a8d9d48c4f1a185fb1596e3478201c9164343:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/weechat
 * [new ref]         635a8d9d48c4f1a185fb1596e3478201c9164343 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 635a8d9 Perl 5.40 rebuild