$ git clone -n https://src.fedoraproject.org/rpms/keysmith.git /var/lib/mock/f42-build-880729-182992/root/chroot_tmpdir/scmroot/keysmith
Cloning into '/var/lib/mock/f42-build-880729-182992/root/chroot_tmpdir/scmroot/keysmith'...
$ git fetch origin 6350189d82eaa02a31c4bc6b175f6e759be7b171:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/keysmith
 * [new ref]         6350189d82eaa02a31c4bc6b175f6e759be7b171 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6350189 Rebuild for ppc64le enablement