$ git clone -n https://src.fedoraproject.org/rpms/rust-nonempty.git /var/lib/mock/f45-build-43437-803/root/chroot_tmpdir/scmroot/rust-nonempty
Cloning into '/var/lib/mock/f45-build-43437-803/root/chroot_tmpdir/scmroot/rust-nonempty'...
$ git fetch origin 162540a49207760a6fc23e4e1891d346582e6f5f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nonempty
 * [new ref]         162540a49207760a6fc23e4e1891d346582e6f5f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 162540a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild