$ git clone -n https://src.fedoraproject.org/rpms/rust-signature.git /var/lib/mock/f40-build-2683299-67970/root/chroot_tmpdir/scmroot/rust-signature
Cloning into '/var/lib/mock/f40-build-2683299-67970/root/chroot_tmpdir/scmroot/rust-signature'...
$ git fetch origin 1a68818b399035380bf9b97b896ba3d82f4d7fbc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-signature
 * [new ref]         1a68818b399035380bf9b97b896ba3d82f4d7fbc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a68818 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild