$ git clone -n https://src.fedoraproject.org/rpms/spasm.git /var/lib/mock/f42-build-3272635-41307/root/chroot_tmpdir/scmroot/spasm
Cloning into '/var/lib/mock/f42-build-3272635-41307/root/chroot_tmpdir/scmroot/spasm'...
$ git fetch origin c111f0b1e3464f073d66af1be81a5c5599d84699:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/spasm
 * [new ref]         c111f0b1e3464f073d66af1be81a5c5599d84699 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c111f0b Add fully-versioned arch-specific dep. from -devel package