$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio-reactor.git /var/lib/mock/f39-build-1500157-34783/root/chroot_tmpdir/scmroot/rust-tokio-reactor
Cloning into '/var/lib/mock/f39-build-1500157-34783/root/chroot_tmpdir/scmroot/rust-tokio-reactor'...
$ git fetch origin 7b6ed3b807a79a6f4a9b51d8d7bc0614c6117593:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio-reactor
 * [new ref]         7b6ed3b807a79a6f4a9b51d8d7bc0614c6117593 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7b6ed3b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild