$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio-reactor.git /var/lib/mock/f38-build-side-43-rust-devel-1413127-31443/root/chroot_tmpdir/scmroot/rust-tokio-reactor
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1413127-31443/root/chroot_tmpdir/scmroot/rust-tokio-reactor'...
$ git fetch origin 6fdadf53bc640f777a27f94e7568ba9e40ba44c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio-reactor
 * [new ref]         6fdadf53bc640f777a27f94e7568ba9e40ba44c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fdadf5 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild