$ git clone -n https://src.fedoraproject.org/rpms/rust-spin0.9.git /var/lib/mock/f45-build-45133-821/root/chroot_tmpdir/scmroot/rust-spin0.9
Cloning into '/var/lib/mock/f45-build-45133-821/root/chroot_tmpdir/scmroot/rust-spin0.9'...
$ git fetch origin 0f12fe5663fc4d66fb22a02201fb09d38bac783c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-spin0.9
 * [new ref]         0f12fe5663fc4d66fb22a02201fb09d38bac783c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f12fe5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild