$ git clone -n https://src.fedoraproject.org/rpms/rust-heapsize.git /var/lib/mock/f39-build-1493682-34539/root/chroot_tmpdir/scmroot/rust-heapsize
Cloning into '/var/lib/mock/f39-build-1493682-34539/root/chroot_tmpdir/scmroot/rust-heapsize'...
$ git fetch origin 25f389353ed9b6a30d50814b6fe94382baf45e42:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-heapsize
 * [new ref]         25f389353ed9b6a30d50814b6fe94382baf45e42 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 25f3893 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild