$ git clone -n https://src.fedoraproject.org/rpms/cockpit.git /var/lib/mock/f40-build-1463491-23582/root/chroot_tmpdir/scmroot/cockpit
Cloning into '/var/lib/mock/f40-build-1463491-23582/root/chroot_tmpdir/scmroot/cockpit'...
$ git fetch origin 2253d9f333a04277202de029fa4339f259928bf9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cockpit
 * [new ref]         2253d9f333a04277202de029fa4339f259928bf9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2253d9f Update to 321 upstream release