$ git clone -n https://gitee.com/errata/linux-firmware.git /var/lib/mock/dist-an7_9-updates-build-384626-71920/root/chroot_tmpdir/scmroot/linux-firmware
Cloning into '/var/lib/mock/dist-an7_9-updates-build-384626-71920/root/chroot_tmpdir/scmroot/linux-firmware'...
$ git fetch origin 5a16a989dfe8134db23e87b6836eb7ab037b4058:KOJI_FETCH_HEAD
From https://gitee.com/errata/linux-firmware
 * [new ref]         5a16a989dfe8134db23e87b6836eb7ab037b4058 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a16a98 Update to linux-firmware-20200421-83.git78c0348.el7_9