$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio-tfo.git /var/lib/mock/f45-build-45531-823/root/chroot_tmpdir/scmroot/rust-tokio-tfo
Cloning into '/var/lib/mock/f45-build-45531-823/root/chroot_tmpdir/scmroot/rust-tokio-tfo'...
$ git fetch origin 46f42ac29436d587c2115c5679c8599268046197:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio-tfo
 * [new ref]         46f42ac29436d587c2115c5679c8599268046197 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 46f42ac Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild