$ git clone -n https://src.fedoraproject.org/rpms/rust-cexpr.git /var/lib/mock/f40-build-2035293-47953/root/chroot_tmpdir/scmroot/rust-cexpr
Cloning into '/var/lib/mock/f40-build-2035293-47953/root/chroot_tmpdir/scmroot/rust-cexpr'...
$ git fetch origin 7fccd0df52a067790ef8425e2c92ebc5c6012b71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cexpr
 * [new ref]         7fccd0df52a067790ef8425e2c92ebc5c6012b71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7fccd0d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild