$ git clone -n https://src.fedoraproject.org/rpms/rust-lib0.git /var/lib/mock/f38-build-side-43-rust-devel-1418256-31459/root/chroot_tmpdir/scmroot/rust-lib0
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1418256-31459/root/chroot_tmpdir/scmroot/rust-lib0'...
$ git fetch origin f39cf3d549c24bd5828fc34721770c77e91ffa26:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lib0
 * [new ref]         f39cf3d549c24bd5828fc34721770c77e91ffa26 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f39cf3d Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild