$ git clone -n https://src.fedoraproject.org/rpms/rust-scx_rustland.git /var/lib/mock/f45-build-44732-816/root/chroot_tmpdir/scmroot/rust-scx_rustland
Cloning into '/var/lib/mock/f45-build-44732-816/root/chroot_tmpdir/scmroot/rust-scx_rustland'...
$ git fetch origin b30f4f672a86e269253d0652e9c9e83f1fe4d35c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-scx_rustland
 * [new ref]         b30f4f672a86e269253d0652e9c9e83f1fe4d35c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b30f4f6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild