$ git clone -n https://src.fedoraproject.org/rpms/kdiamond.git /var/lib/mock/f42-build-3279373-41337/root/chroot_tmpdir/scmroot/kdiamond
Cloning into '/var/lib/mock/f42-build-3279373-41337/root/chroot_tmpdir/scmroot/kdiamond'...
$ git fetch origin e7b74ad941edf131a908af4b0c9641e76af4c80d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kdiamond
 * [new ref]         e7b74ad941edf131a908af4b0c9641e76af4c80d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7b74ad Rebuild for ppc64le enablement