$ git clone -n https://src.fedoraproject.org/rpms/marble.git /var/lib/mock/f42-flatpak-app-build-60937279-6586352/root/chroot_tmpdir/scmroot/marble
Cloning into '/var/lib/mock/f42-flatpak-app-build-60937279-6586352/root/chroot_tmpdir/scmroot/marble'...
$ git fetch origin 42e4cb440c40ffb211cf45f9879a51e8cfe48ae9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/marble
 * [new ref]         42e4cb440c40ffb211cf45f9879a51e8cfe48ae9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42e4cb4 25.04.3