$ git clone -n https://src.fedoraproject.org/rpms/rust-block-modes.git /var/lib/mock/f38-build-side-43-rust-devel-1412239-31440/root/chroot_tmpdir/scmroot/rust-block-modes
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1412239-31440/root/chroot_tmpdir/scmroot/rust-block-modes'...
$ git fetch origin 99753942c6e3eb12857ca72cfbdc16db959ca1d5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-block-modes
 * [new ref]         99753942c6e3eb12857ca72cfbdc16db959ca1d5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9975394 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild