$ git clone -n https://src.fedoraproject.org/rpms/deepin-desktop-schemas.git /var/lib/mock/f41-build-848411-164423/root/chroot_tmpdir/scmroot/deepin-desktop-schemas
Cloning into '/var/lib/mock/f41-build-848411-164423/root/chroot_tmpdir/scmroot/deepin-desktop-schemas'...
$ git fetch origin b39f8db6a2dbb53b28c879bf53a27eda46d49a52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/deepin-desktop-schemas
 * [new ref]         b39f8db6a2dbb53b28c879bf53a27eda46d49a52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b39f8db 6.0.6