$ git clone -n https://src.fedoraproject.org/rpms/libtar.git /var/lib/mock/f40-build-2295383-56325/root/chroot_tmpdir/scmroot/libtar
Cloning into '/var/lib/mock/f40-build-2295383-56325/root/chroot_tmpdir/scmroot/libtar'...
$ git fetch origin 770af95533aa88918b05ef914c30488d98dd09c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libtar
 * [new ref]         770af95533aa88918b05ef914c30488d98dd09c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 770af95 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild