$ git clone -n https://src.fedoraproject.org/rpms/rust-josekit.git /var/lib/mock/f40-build-2571806-62241/root/chroot_tmpdir/scmroot/rust-josekit
Cloning into '/var/lib/mock/f40-build-2571806-62241/root/chroot_tmpdir/scmroot/rust-josekit'...
$ git fetch origin bae1efe342a067aeb9018e756cb48e01f4fd00e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-josekit
 * [new ref]         bae1efe342a067aeb9018e756cb48e01f4fd00e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bae1efe Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild