$ git clone -n https://github.com/xcp-ng-rpms/dmidecode.git /var/lib/mock/v8.3-incoming-10772-29291/root/chroot_tmpdir/scmroot/dmidecode
Cloning into '/var/lib/mock/v8.3-incoming-10772-29291/root/chroot_tmpdir/scmroot/dmidecode'...
$ git fetch origin ba10d0cfefae12bd38719ab7faaf8907223c6951:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/dmidecode
 * [new ref]         ba10d0cfefae12bd38719ab7faaf8907223c6951 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba10d0c Import dmidecode-3.6-1.fc40.src.rpm