$ git clone -n https://src.fedoraproject.org/rpms/rust-mio-extras.git /var/lib/mock/f39-build-1521074-35836/root/chroot_tmpdir/scmroot/rust-mio-extras
Cloning into '/var/lib/mock/f39-build-1521074-35836/root/chroot_tmpdir/scmroot/rust-mio-extras'...
$ git fetch origin 68a998ebaafd1e43a39e2fdd2a1e8096a72972c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-mio-extras
 * [new ref]         68a998ebaafd1e43a39e2fdd2a1e8096a72972c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68a998e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild