$ git clone -n https://src.fedoraproject.org/rpms/minetest.git /var/lib/mock/f39-build-1923949-43012/root/chroot_tmpdir/scmroot/minetest
Cloning into '/var/lib/mock/f39-build-1923949-43012/root/chroot_tmpdir/scmroot/minetest'...
$ git fetch origin 6dc6220a027730e1e0a26902b68a502cfaab55b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/minetest
 * [new ref]         6dc6220a027730e1e0a26902b68a502cfaab55b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6dc6220 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild