$ git clone -n https://src.fedoraproject.org/rpms/libretro-nestopia.git /var/lib/mock/f40-build-2008265-45357/root/chroot_tmpdir/scmroot/libretro-nestopia
Cloning into '/var/lib/mock/f40-build-2008265-45357/root/chroot_tmpdir/scmroot/libretro-nestopia'...
$ git fetch origin fa61f3a11a182d6713c5349237f207724a333bb6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libretro-nestopia
 * [new ref]         fa61f3a11a182d6713c5349237f207724a333bb6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa61f3a chore: Update to latest git snapshot