$ git clone -n https://src.fedoraproject.org/rpms/minetest.git /var/lib/mock/f39-build-2465850-61444/root/chroot_tmpdir/scmroot/minetest
Cloning into '/var/lib/mock/f39-build-2465850-61444/root/chroot_tmpdir/scmroot/minetest'...
$ git fetch origin 6619fb160fb26247ad31a7cbaf71632cf6b68160:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/minetest
 * [new ref]         6619fb160fb26247ad31a7cbaf71632cf6b68160 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6619fb1 Updated minetest_game