$ git clone -n https://src.fedoraproject.org/rpms/cosmic-edit.git /var/lib/mock/f42-flatpak-app-build-59152395-6571325/root/chroot_tmpdir/scmroot/cosmic-edit
Cloning into '/var/lib/mock/f42-flatpak-app-build-59152395-6571325/root/chroot_tmpdir/scmroot/cosmic-edit'...
$ git fetch origin a53ce6fe6685d9882e7cf1ff92003463ff6ee93b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cosmic-edit
 * [new ref]         a53ce6fe6685d9882e7cf1ff92003463ff6ee93b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a53ce6f Fix building for s390x and ppc64le