$ git clone -n https://src.fedoraproject.org/rpms/libtorrent.git /var/lib/mock/f40-build-785856-134129/root/chroot_tmpdir/scmroot/libtorrent
Cloning into '/var/lib/mock/f40-build-785856-134129/root/chroot_tmpdir/scmroot/libtorrent'...
$ git fetch origin c4a2b6da8a0c4c78737829d86893687a362c2ff0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libtorrent
 * [new ref]         c4a2b6da8a0c4c78737829d86893687a362c2ff0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4a2b6d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild