$ git clone -n https://src.fedoraproject.org/rpms/htmlcxx.git /var/lib/mock/f39-build-1465636-33601/root/chroot_tmpdir/scmroot/htmlcxx
Cloning into '/var/lib/mock/f39-build-1465636-33601/root/chroot_tmpdir/scmroot/htmlcxx'...
$ git fetch origin dbecdbe470e81e279d9b6aca687e240f5a698979:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/htmlcxx
 * [new ref]         dbecdbe470e81e279d9b6aca687e240f5a698979 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dbecdbe Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild