$ git clone -n https://src.fedoraproject.org/rpms/rust-error-chain.git /var/lib/mock/f40-build-2036214-48010/root/chroot_tmpdir/scmroot/rust-error-chain
Cloning into '/var/lib/mock/f40-build-2036214-48010/root/chroot_tmpdir/scmroot/rust-error-chain'...
$ git fetch origin 3084298b802c8a0158078ee6b8a0af50f8bce9b8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-error-chain
 * [new ref]         3084298b802c8a0158078ee6b8a0af50f8bce9b8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3084298 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild