$ git clone -n https://src.fedoraproject.org/rpms/deepin-calendar.git /var/lib/mock/f41-build-848399-164423/root/chroot_tmpdir/scmroot/deepin-calendar
Cloning into '/var/lib/mock/f41-build-848399-164423/root/chroot_tmpdir/scmroot/deepin-calendar'...
$ git fetch origin 15f8e7a9d786e818c5a3c65c620a9e570f907bd7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/deepin-calendar
 * [new ref]         15f8e7a9d786e818c5a3c65c620a9e570f907bd7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15f8e7a 5.14.3