$ git clone -n https://src.fedoraproject.org/rpms/polkit-kde.git /var/lib/mock/f39-build-2054374-49108/root/chroot_tmpdir/scmroot/polkit-kde
Cloning into '/var/lib/mock/f39-build-2054374-49108/root/chroot_tmpdir/scmroot/polkit-kde'...
$ git fetch origin b6a56a2a312a4f996bf01f4929f850dfec60d1cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/polkit-kde
 * [new ref]         b6a56a2a312a4f996bf01f4929f850dfec60d1cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6a56a2 5.27.10