$ git clone -n https://src.fedoraproject.org/rpms/rust-tinyvec_macros.git /var/lib/mock/f45-build-45461-823/root/chroot_tmpdir/scmroot/rust-tinyvec_macros
Cloning into '/var/lib/mock/f45-build-45461-823/root/chroot_tmpdir/scmroot/rust-tinyvec_macros'...
$ git fetch origin 68288b8be3bb27204b90bc0c2282007efa2ababf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tinyvec_macros
 * [new ref]         68288b8be3bb27204b90bc0c2282007efa2ababf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68288b8 Regenerate with rust2rpm v28