$ git clone -n https://src.fedoraproject.org/rpms/kf5-kmediaplayer.git /var/lib/mock/f38-build-side-42-init-devel-571317-25911/root/chroot_tmpdir/scmroot/kf5-kmediaplayer
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-571317-25911/root/chroot_tmpdir/scmroot/kf5-kmediaplayer'...
$ git fetch origin b20378a415c6c40a5a4594b4339be61e290188a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kmediaplayer
 * [new ref]         b20378a415c6c40a5a4594b4339be61e290188a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b20378a 5.104.0