$ git clone -n https://src.fedoraproject.org/rpms/plasma-nano.git /var/lib/mock/f41-build-824538-154178/root/chroot_tmpdir/scmroot/plasma-nano
Cloning into '/var/lib/mock/f41-build-824538-154178/root/chroot_tmpdir/scmroot/plasma-nano'...
$ git fetch origin 20a7b326e4a492176c8ba875323a1be4a15c072f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-nano
 * [new ref]         20a7b326e4a492176c8ba875323a1be4a15c072f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20a7b32 rebuild