$ git clone -n https://src.fedoraproject.org/rpms/rust-supports-unicode.git /var/lib/mock/f39-build-1535182-36246/root/chroot_tmpdir/scmroot/rust-supports-unicode
Cloning into '/var/lib/mock/f39-build-1535182-36246/root/chroot_tmpdir/scmroot/rust-supports-unicode'...
$ git fetch origin 9b7159608071091821af89fb44735153ebf56d38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-supports-unicode
 * [new ref]         9b7159608071091821af89fb44735153ebf56d38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b71596 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild