$ git clone -n https://src.fedoraproject.org/rpms/rust-rend0.4.git /var/lib/mock/f45-build-44434-813/root/chroot_tmpdir/scmroot/rust-rend0.4
Cloning into '/var/lib/mock/f45-build-44434-813/root/chroot_tmpdir/scmroot/rust-rend0.4'...
$ git fetch origin 895abb7d8f169aad7d4fa7e9d2381e2913aa1543:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rend0.4
 * [new ref]         895abb7d8f169aad7d4fa7e9d2381e2913aa1543 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 895abb7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild