$ git clone -n https://src.fedoraproject.org/rpms/arm-trusted-firmware.git /var/lib/mock/f40-build-768718-125374/root/chroot_tmpdir/scmroot/arm-trusted-firmware
Cloning into '/var/lib/mock/f40-build-768718-125374/root/chroot_tmpdir/scmroot/arm-trusted-firmware'...
$ git fetch origin 8ac322fe288b14e12157cf18ef0dfa218628735f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arm-trusted-firmware
 * [new ref]         8ac322fe288b14e12157cf18ef0dfa218628735f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ac322f 2.10.0