$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio-core.git /var/lib/mock/f40-build-2308541-57305/root/chroot_tmpdir/scmroot/rust-tokio-core
Cloning into '/var/lib/mock/f40-build-2308541-57305/root/chroot_tmpdir/scmroot/rust-tokio-core'...
$ git fetch origin 5d4b091c46182e2823014645fcdbeefeff95cd22:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio-core
 * [new ref]         5d4b091c46182e2823014645fcdbeefeff95cd22 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d4b091 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild