$ git clone -n https://src.fedoraproject.org/rpms/plasma-pa.git /var/lib/mock/f40-build-1509013-23893/root/chroot_tmpdir/scmroot/plasma-pa
Cloning into '/var/lib/mock/f40-build-1509013-23893/root/chroot_tmpdir/scmroot/plasma-pa'...
$ git fetch origin b7b4740560e089b838d38a811efa81dc7f94e5c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-pa
 * [new ref]         b7b4740560e089b838d38a811efa81dc7f94e5c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b7b4740 6.1.2