$ git clone -n https://src.fedoraproject.org/rpms/rust-html5ever.git /var/lib/mock/f40-build-2156940-50920/root/chroot_tmpdir/scmroot/rust-html5ever
Cloning into '/var/lib/mock/f40-build-2156940-50920/root/chroot_tmpdir/scmroot/rust-html5ever'...
$ git fetch origin c710dc6da1fc20468ddb4f97e454213c09c39a54:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-html5ever
 * [new ref]         c710dc6da1fc20468ddb4f97e454213c09c39a54 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c710dc6 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild