$ git clone -n https://src.fedoraproject.org/rpms/rust-dyn-clone.git /var/lib/mock/f45-build-41385-782/root/chroot_tmpdir/scmroot/rust-dyn-clone
Cloning into '/var/lib/mock/f45-build-41385-782/root/chroot_tmpdir/scmroot/rust-dyn-clone'...
$ git fetch origin e74368b9ad1b0f067cb90190dde1f223e6abc9bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dyn-clone
 * [new ref]         e74368b9ad1b0f067cb90190dde1f223e6abc9bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e74368b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild