$ git clone -n https://src.fedoraproject.org/rpms/libplasma.git /var/lib/mock/f41-build-side-1-2773538-32311/root/chroot_tmpdir/scmroot/libplasma
Cloning into '/var/lib/mock/f41-build-side-1-2773538-32311/root/chroot_tmpdir/scmroot/libplasma'...
$ git fetch origin 2d40fb1f6a3c7e153f008fe73f22fc1f94ef54ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libplasma
 * [new ref]         2d40fb1f6a3c7e153f008fe73f22fc1f94ef54ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d40fb1 6.1.90