$ git clone -n https://src.fedoraproject.org/rpms/rust-signature.git /var/lib/mock/f39-build-1517164-35693/root/chroot_tmpdir/scmroot/rust-signature
Cloning into '/var/lib/mock/f39-build-1517164-35693/root/chroot_tmpdir/scmroot/rust-signature'...
$ git fetch origin 7a0fa81903b50904af1e7b807f9f29993937a859:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-signature
 * [new ref]         7a0fa81903b50904af1e7b807f9f29993937a859 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a0fa81 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild