$ git clone -n https://src.fedoraproject.org/rpms/plasma-welcome.git /var/lib/mock/f40-build-2255808-54266/root/chroot_tmpdir/scmroot/plasma-welcome
Cloning into '/var/lib/mock/f40-build-2255808-54266/root/chroot_tmpdir/scmroot/plasma-welcome'...
$ git fetch origin 1351eeda34d4883701c33a8bb6c09487cec93cce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-welcome
 * [new ref]         1351eeda34d4883701c33a8bb6c09487cec93cce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1351eed 5.92.0