$ git clone -n https://src.fedoraproject.org/rpms/libretro-desmume2015.git /var/lib/mock/f42-build-3364874-45045/root/chroot_tmpdir/scmroot/libretro-desmume2015
Cloning into '/var/lib/mock/f42-build-3364874-45045/root/chroot_tmpdir/scmroot/libretro-desmume2015'...
$ git fetch origin e90c64d17e93399693a5cb8330094deb06dd15f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libretro-desmume2015
 * [new ref]         e90c64d17e93399693a5cb8330094deb06dd15f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e90c64d Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild