$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_nested.git /var/lib/mock/f41-build-side-1-3134923-39764/root/chroot_tmpdir/scmroot/rust-sval_nested
Cloning into '/var/lib/mock/f41-build-side-1-3134923-39764/root/chroot_tmpdir/scmroot/rust-sval_nested'...
$ git fetch origin 83162200d34b7ebda9c61eb4e75a28c9607dedbf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_nested
 * [new ref]         83162200d34b7ebda9c61eb4e75a28c9607dedbf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8316220 no longer needed