$ git clone -n https://src.fedoraproject.org/rpms/plasma-desktop.git /var/lib/mock/f41-build-side-1-3073822-38856/root/chroot_tmpdir/scmroot/plasma-desktop
Cloning into '/var/lib/mock/f41-build-side-1-3073822-38856/root/chroot_tmpdir/scmroot/plasma-desktop'...
$ git fetch origin e34ed340b898028dde878e3083311362d7fb1c54:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-desktop
 * [new ref]         e34ed340b898028dde878e3083311362d7fb1c54 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e34ed34 Merge branch 'rawhide' into f41