$ git clone -n https://src.fedoraproject.org/rpms/plasma-workspace.git /var/lib/mock/f40-build-788842-135430/root/chroot_tmpdir/scmroot/plasma-workspace
Cloning into '/var/lib/mock/f40-build-788842-135430/root/chroot_tmpdir/scmroot/plasma-workspace'...
$ git fetch origin 2487340c6a8efce9e6055d76d43972e9ebc31d64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-workspace
 * [new ref]         2487340c6a8efce9e6055d76d43972e9ebc31d64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2487340 Respin 6.0.0