$ git clone -n https://src.fedoraproject.org/rpms/rust-autocfg.git /var/lib/mock/f39-build-1488554-34499/root/chroot_tmpdir/scmroot/rust-autocfg
Cloning into '/var/lib/mock/f39-build-1488554-34499/root/chroot_tmpdir/scmroot/rust-autocfg'...
$ git fetch origin fcd0237fd901c45bbfe6a6df8656e948d15f341e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-autocfg
 * [new ref]         fcd0237fd901c45bbfe6a6df8656e948d15f341e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fcd0237 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild