$ git clone -n https://src.fedoraproject.org/rpms/rust-tinystr.git /var/lib/mock/f42-build-side-1-3539498-46565/root/chroot_tmpdir/scmroot/rust-tinystr
Cloning into '/var/lib/mock/f42-build-side-1-3539498-46565/root/chroot_tmpdir/scmroot/rust-tinystr'...
$ git fetch origin 70bd9a21cc3927f17fde12beec7fc808488a79f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tinystr
 * [new ref]         70bd9a21cc3927f17fde12beec7fc808488a79f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 70bd9a2 Enable the tests, now that we have postcard