$ git clone -n https://src.fedoraproject.org/rpms/R-AsioHeaders.git /var/lib/mock/f39-build-1470427-33896/root/chroot_tmpdir/scmroot/R-AsioHeaders
Cloning into '/var/lib/mock/f39-build-1470427-33896/root/chroot_tmpdir/scmroot/R-AsioHeaders'...
$ git fetch origin 70863c9528b103220e21b497fe23ed0476142b2a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-AsioHeaders
 * [new ref]         70863c9528b103220e21b497fe23ed0476142b2a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 70863c9 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild