$ git clone -n https://src.fedoraproject.org/rpms/rust-lib0.git /var/lib/mock/f39-build-1525913-36058/root/chroot_tmpdir/scmroot/rust-lib0
Cloning into '/var/lib/mock/f39-build-1525913-36058/root/chroot_tmpdir/scmroot/rust-lib0'...
$ git fetch origin 27b78e850576e3c5ae2960abab29075ab2df869c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lib0
 * [new ref]         27b78e850576e3c5ae2960abab29075ab2df869c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27b78e8 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild