$ git clone -n https://src.fedoraproject.org/forks/xosevp/rpms/redhat-rpm-config.git /var/lib/mock/f43-build-60964728-6587044/root/chroot_tmpdir/scmroot/redhat-rpm-config
Cloning into '/var/lib/mock/f43-build-60964728-6587044/root/chroot_tmpdir/scmroot/redhat-rpm-config'...
$ git fetch origin 012dca393f59f38aa3a49fc3aee496eaf77bd096:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/xosevp/rpms/redhat-rpm-config
 * [new ref]         012dca393f59f38aa3a49fc3aee496eaf77bd096 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 012dca3 RFE: move the baseline arch to z14 for s390x in F-43+