$ git clone -n https://src.fedoraproject.org/rpms/plasma-workspace.git /var/lib/mock/f45-build-28697-632/root/chroot_tmpdir/scmroot/plasma-workspace
Cloning into '/var/lib/mock/f45-build-28697-632/root/chroot_tmpdir/scmroot/plasma-workspace'...
$ git fetch origin 5534252a31a693c3799463515d796a0a3dbcb87c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-workspace
 * [new ref]         5534252a31a693c3799463515d796a0a3dbcb87c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5534252 Rebuild for Qt update