$ git clone -n https://src.fedoraproject.org/rpms/plasma-pa.git /var/lib/mock/f42-build-side-1-3566290-46733/root/chroot_tmpdir/scmroot/plasma-pa
Cloning into '/var/lib/mock/f42-build-side-1-3566290-46733/root/chroot_tmpdir/scmroot/plasma-pa'...
$ git fetch origin 359319c218fb6b6f8fc5f7ffababe9a33dc90adf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-pa
 * [new ref]         359319c218fb6b6f8fc5f7ffababe9a33dc90adf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 359319c 6.4.0