$ git clone -n https://src.fedoraproject.org/rpms/rust-typetag.git /var/lib/mock/f42-build-side-1-3585753-46907/root/chroot_tmpdir/scmroot/rust-typetag
Cloning into '/var/lib/mock/f42-build-side-1-3585753-46907/root/chroot_tmpdir/scmroot/rust-typetag'...
$ git fetch origin 6db0d9c59eece861da4b2389f62c6b8c963b1245:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-typetag
 * [new ref]         6db0d9c59eece861da4b2389f62c6b8c963b1245 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6db0d9c Enable the tests, now that we have postcard