$ git clone -n https://src.fedoraproject.org/rpms/rust-encoding_rs_io.git /var/lib/mock/f39-build-1517086-35683/root/chroot_tmpdir/scmroot/rust-encoding_rs_io
Cloning into '/var/lib/mock/f39-build-1517086-35683/root/chroot_tmpdir/scmroot/rust-encoding_rs_io'...
$ git fetch origin a41f56efa5567b41e27aa15a44b71dae684bc4a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-encoding_rs_io
 * [new ref]         a41f56efa5567b41e27aa15a44b71dae684bc4a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a41f56e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild