$ git clone -n https://src.fedoraproject.org/rpms/rust-kstring.git /var/lib/mock/f38-build-side-43-rust-devel-1409810-31406/root/chroot_tmpdir/scmroot/rust-kstring
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1409810-31406/root/chroot_tmpdir/scmroot/rust-kstring'...
$ git fetch origin 983d185b6799e7fc3af6ed3405ec72e1f733a925:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-kstring
 * [new ref]         983d185b6799e7fc3af6ed3405ec72e1f733a925 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 983d185 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild