$ git clone -n https://src.fedoraproject.org/rpms/virt-firmware-rs.git /var/lib/mock/f43-build-61011999-6587669/root/chroot_tmpdir/scmroot/virt-firmware-rs
Cloning into '/var/lib/mock/f43-build-61011999-6587669/root/chroot_tmpdir/scmroot/virt-firmware-rs'...
$ git fetch origin 500b23d210fd97d5bd631800a6b3eb59b0cadb89:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/virt-firmware-rs
 * [new ref]         500b23d210fd97d5bd631800a6b3eb59b0cadb89 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 500b23d disable tests on s390x