$ git clone -n https://src.fedoraproject.org/rpms/plasma-mobile.git /var/lib/mock/f41-build-860559-169002/root/chroot_tmpdir/scmroot/plasma-mobile
Cloning into '/var/lib/mock/f41-build-860559-169002/root/chroot_tmpdir/scmroot/plasma-mobile'...
$ git fetch origin 8d38f709304528b363e13f27da05cb077cb72449:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-mobile
 * [new ref]         8d38f709304528b363e13f27da05cb077cb72449 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d38f70 6.2.2