$ git clone -n https://src.fedoraproject.org/rpms/flatpak-kcm.git /var/lib/mock/f38-build-side-42-init-devel-603181-26218/root/chroot_tmpdir/scmroot/flatpak-kcm
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-603181-26218/root/chroot_tmpdir/scmroot/flatpak-kcm'...
$ git fetch origin 4387e43a549cb759e8c9ee541f30c4afe09e4d9f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flatpak-kcm
 * [new ref]         4387e43a549cb759e8c9ee541f30c4afe09e4d9f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4387e43 5.27.4