$ git clone -n https://src.fedoraproject.org/rpms/rust-unscanny.git /var/lib/mock/f45-build-45952-829/root/chroot_tmpdir/scmroot/rust-unscanny
Cloning into '/var/lib/mock/f45-build-45952-829/root/chroot_tmpdir/scmroot/rust-unscanny'...
$ git fetch origin 6f4167f9382e30d10f82b6164487c83513bfd72e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unscanny
 * [new ref]         6f4167f9382e30d10f82b6164487c83513bfd72e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f4167f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild